Moved the weatherfeeder model out of internal/ so that downstream consumers can import it directly.

- Add common SynthStationID helpers for coordinate-based providers
- Use shared helper for Open-Meteo and OpenWeather station ID synthesis
- Require both lat/lon when generating synthetic IDs to avoid misleading defaults
- Remove unused Open-Meteo normalizer wrapper code

This reduces cross-provider duplication while keeping provider-specific
mapping logic explicit and readable.

.dockerignore

@@ -0,0 +1,7 @@
+.git
+.gitignore
+**/*.md
+dist/
+tmp/
+.DS_Store
+

.woodpecker/build-image.yml

@@ -0,0 +1,17 @@
+when:
+  # Allow both normal runs (push) and UI-triggered runs (manual)
+  - event: [push, manual]
+
+steps:
+  - name: build-and-push-image
+    image: harbor.maximumdirect.net/proxy-dockerhub/woodpeckerci/plugin-kaniko
+    settings:
+      registry: harbor.maximumdirect.net
+      repo: build/weatherfeeder
+      auto_tag: true 
+      username:
+        from_secret: HARBOR_ROBOT_USER
+      password:
+        from_secret: HARBOR_ROBOT_TOKEN
+      cache: true
+      cache_repo: build-cache/weatherfeeder

API.md

@@ -0,0 +1,319 @@
+# weatherfeeder API (Wire Contract)
+
+This document defines the stable, consumer-facing JSON contract emitted by weatherfeeder sinks.
+
+weatherfeeder emits **events** encoded as JSON. Each event has:
+- an **envelope** (metadata + schema identifier), and
+- a **payload** whose shape is determined by `schema`.
+
+Downstream consumers should:
+1. parse the event envelope,
+2. switch on `schema`, then
+3. decode `payload` into the matching schema.
+
+---
+
+## Event envelope
+
+All events are JSON objects with these fields:
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `id` | string | yes | Stable event identifier. Treat as opaque. |
+| `schema` | string | yes | Schema identifier (e.g. `weather.observation.v1`). |
+| `source` | string | yes | Provider/source identifier (stable within configuration). |
+| `effectiveAt` | string (timestamp) | yes | RFC3339Nano timestamp indicating when this event is effective. |
+| `payload` | object | yes | Schema-specific payload (see below). |
+
+### Timestamp format
+
+All timestamps are encoded as JSON strings using Go’s `time.Time` JSON encoding (RFC3339Nano).
+
+Examples:
+- `"2026-01-17T14:27:00Z"`
+- `"2026-01-17T08:27:00-06:00"`
+
+---
+
+## Canonical schemas
+
+weatherfeeder emits three canonical domain schemas:
+
+- `weather.observation.v1`
+- `weather.forecast.v1`
+- `weather.alert.v1`
+
+Each payload is described below using the JSON field names as the contract.
+
+---
+
+## Shared Conventions
+
+- Timestamps are JSON strings in RFC3339Nano format.
+- Optional fields are omitted when unknown (`omitempty` behavior).
+- Numeric measurements are normalized to metric units:
+  - `*C` = Celsius
+  - `*Kmh` = kilometers/hour
+  - `*Pa` = Pascals
+  - `*Meters` = meters
+  - `*Mm` = millimeters
+  - `*Percent` = percent (0-100)
+- `conditionCode` is a WMO weather interpretation code (`int`).
+  - Unknown/unmappable is `-1`.
+  - Downstream consumers should treat unknown codes as “unknown conditions” rather than failing decoding.
+- For readability and stability, weatherfeeder rounds floating-point values in canonical payloads to
+**4 digits after the decimal** during normalization.
+
+---
+
+## Schema: `weather.observation.v1`
+
+Payload type: `WeatherObservation`
+
+A `WeatherObservation` represents a point-in-time observation for a station/location.
+
+### Fields
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `stationId` | string | no | Provider station/location identifier |
+| `stationName` | string | no | Human station name |
+| `timestamp` | timestamp string | yes | Observation timestamp |
+| `conditionCode` | int | yes | WMO code (`-1` unknown) |
+| `conditionText` | string | no | Canonical short condition text |
+| `isDay` | bool | no | Day/night hint |
+| `providerRawDescription` | string | no | Provider-specific evidence text |
+| `textDescription` | string | no | Legacy/transitional text description |
+| `iconUrl` | string | no | Legacy/transitional icon URL |
+| `temperatureC` | number | no | Celsius |
+| `dewpointC` | number | no | Celsius |
+| `windDirectionDegrees` | number | no | Degrees |
+| `windSpeedKmh` | number | no | km/h |
+| `windGustKmh` | number | no | km/h |
+| `barometricPressurePa` | number | no | Pascals |
+| `seaLevelPressurePa` | number | no | Pascals |
+| `visibilityMeters` | number | no | Meters |
+| `relativeHumidityPercent` | number | no | Percent |
+| `apparentTemperatureC` | number | no | Celsius |
+| `elevationMeters` | number | no | Meters |
+| `rawMessage` | string | no | Provider raw message (for example METAR) |
+| `presentWeather` | array | no | Provider-specific structured weather fragments |
+| `cloudLayers` | array | no | Cloud layer details |
+
+### Nested: `cloudLayers[]`
+
+Each `cloudLayers[]` element:
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `baseMeters` | number | no | Cloud base altitude in meters |
+| `amount` | string | no | Provider string (e.g. FEW/SCT/BKN/OVC) |
+
+### Nested: `presentWeather[]`
+
+Each `presentWeather[]` element:
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `raw` | object | no | Provider-specific JSON object |
+
+---
+
+## Schema: `weather.forecast.v1`
+
+Payload type: `WeatherForecastRun`
+
+A `WeatherForecastRun` is a single issued forecast snapshot for a location and a specific product
+(hourly / narrative / daily). The run contains an ordered list of forecast periods.
+
+### `product` values
+
+`product` is one of:
+
+- `"hourly"`
+- `"narrative"`
+- `"daily"`
+
+### Fields
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `locationId` | string | no | Provider location identifier |
+| `locationName` | string | no | Human name, if available |
+| `issuedAt` | string (timestamp) | yes | When this run was generated/issued |
+| `updatedAt` | string (timestamp) | no | Optional later update time |
+| `product` | string | yes | One of `hourly`, `narrative`, `daily` |
+| `latitude` | number | no | Degrees |
+| `longitude` | number | no | Degrees |
+| `elevationMeters` | number | no | meters |
+| `periods` | array | yes | Chronological forecast periods |
+
+### Nested: `periods[]` (`WeatherForecastPeriod`)
+
+A `WeatherForecastPeriod` is valid for `[startTime, endTime)`.
+
+| Field | Type | Required | Units / Notes |
+|---|---:|:---:|---|
+| `startTime` | string (timestamp) | yes | Period start |
+| `endTime` | string (timestamp) | yes | Period end |
+| `name` | string | no | Human label (often empty for hourly) |
+| `isDay` | bool | no | Day/night hint |
+| `conditionCode` | int | yes | WMO code (`-1` for unknown) |
+| `conditionText` | string | no | Canonical short text |
+| `providerRawDescription` | string | no | Provider-specific “evidence” text |
+| `textDescription` | string | no | Human-facing short phrase |
+| `detailedText` | string | no | Longer narrative |
+| `iconUrl` | string | no | Legacy/transitional |
+| `temperatureC` | number | no | °C |
+| `temperatureCMin` | number | no | °C (aggregated products) |
+| `temperatureCMax` | number | no | °C (aggregated products) |
+| `dewpointC` | number | no | °C |
+| `relativeHumidityPercent` | number | no | percent |
+| `windDirectionDegrees` | number | no | degrees |
+| `windSpeedKmh` | number | no | km/h |
+| `windGustKmh` | number | no | km/h |
+| `barometricPressurePa` | number | no | Pa |
+| `visibilityMeters` | number | no | meters |
+| `apparentTemperatureC` | number | no | °C |
+| `cloudCoverPercent` | number | no | percent |
+| `probabilityOfPrecipitationPercent` | number | no | percent |
+| `precipitationAmountMm` | number | no | mm (liquid equivalent) |
+| `snowfallDepthMm` | number | no | mm |
+| `uvIndex` | number | no | unitless index |
+
+---
+
+## Schema: `weather.alert.v1`
+
+Payload type: `WeatherAlertRun`
+
+A `WeatherAlertRun` is a snapshot of *active* alerts for a location as-of a point in time.
+A run may contain zero, one, or many alerts.
+
+### Fields
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `locationId` | string | no | Provider location identifier |
+| `locationName` | string | no | Human name, if available |
+| `asOf` | string (timestamp) | yes | When the provider asserted this snapshot is current |
+| `latitude` | number | no | Degrees |
+| `longitude` | number | no | Degrees |
+| `alerts` | array | yes | Active alerts (order provider-dependent) |
+
+### Nested: `alerts[]` (`WeatherAlert`)
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `id` | string | yes | Provider-stable identifier (often a URL/URI) |
+| `event` | string | no | Classification/event label |
+| `headline` | string | no | Alert headline |
+| `severity` | string | no | Example: Extreme/Severe/Moderate/Minor/Unknown |
+| `urgency` | string | no | Example: Immediate/Expected/Future/Past/Unknown |
+| `certainty` | string | no | Example: Observed/Likely/Possible/Unlikely/Unknown |
+| `status` | string | no | Example: Actual/Exercise/Test/System/Unknown |
+| `messageType` | string | no | Example: Alert/Update/Cancel |
+| `category` | string | no | Example: Met/Geo/Safety/Rescue/Fire/Health/Env/Transport/Infra/CBRNE/Other |
+| `response` | string | no | Example: Shelter/Evacuate/Prepare/Execute/Avoid/Monitor/Assess/AllClear/None |
+| `response` | string | no | e.g. Shelter/Evacuate/Prepare/... |
+| `description` | string | no | Narrative |
+| `instruction` | string | no | What to do |
+| `sent` | string (timestamp) | no | Provider-dependent |
+| `effective` | string (timestamp) | no | Provider-dependent |
+| `onset` | string (timestamp) | no | Provider-dependent |
+| `expires` | string (timestamp) | no | Provider-dependent |
+| `areaDescription` | string | no | Often a provider string |
+| `senderName` | string | no | Provenance |
+| `references` | array | no | Related alert references |
+
+### Nested: `references[]` (`AlertReference`)
+
+| Field | Type | Required | Notes |
+|---|---:|:---:|---|
+| `id` | string | no | Provider reference ID/URI |
+| `identifier` | string | no | Provider identifier string, if distinct |
+| `sender` | string | no | Sender |
+| `sent` | string (timestamp) | no | Timestamp |
+
+---
+
+## Compatibility rules
+
+- Consumers **must** ignore unknown fields.
+- Producers (weatherfeeder) prefer **additive changes** within a schema version.
+- Renames/removals/semantic breaks require a **schema version bump** (`weather.*.v2`).
+
+---
+
+## Examples
+
+### Observation event (`weather.observation.v1`)
+
+```json
+{
+  "id": "nws:KSTL:2026-01-17T14:00:00Z",
+  "schema": "weather.observation.v1",
+  "source": "nws_observation",
+  "effectiveAt": "2026-01-17T14:00:00Z",
+  "payload": {
+    "stationId": "KSTL",
+    "timestamp": "2026-01-17T14:00:00Z",
+    "conditionCode": 1,
+    "conditionText": "Mainly Sunny",
+    "temperatureC": 3.25,
+    "windSpeedKmh": 18.5
+  }
+}
+```
+
+### Forecast event (`weather.forecast.v1`)
+
+```json
+{
+  "id": "openmeteo:38.63,-90.20:2026-01-17T13:00:00Z",
+  "schema": "weather.forecast.v1",
+  "source": "openmeteo_forecast",
+  "effectiveAt": "2026-01-17T13:00:00Z",
+  "payload": {
+    "locationName": "St. Louis, MO",
+    "issuedAt": "2026-01-17T13:00:00Z",
+    "product": "hourly",
+    "latitude": 38.63,
+    "longitude": -90.2,
+    "periods": [
+      {
+        "startTime": "2026-01-17T14:00:00Z",
+        "endTime": "2026-01-17T15:00:00Z",
+        "conditionCode": 2,
+        "conditionText": "Partly Cloudy",
+        "temperatureC": 3.5,
+        "probabilityOfPrecipitationPercent": 10
+      }
+    ]
+  }
+}
+```
+
+### Alert event (`weather.alert.v1`)
+
+```json
+{
+  "id": "nws:alerts:2026-01-17T14:10:00Z",
+  "schema": "weather.alert.v1",
+  "source": "nws_alerts",
+  "effectiveAt": "2026-01-17T14:10:00Z",
+  "payload": {
+    "asOf": "2026-01-17T14:05:00Z",
+    "alerts": [
+      {
+        "id": "https://api.weather.gov/alerts/abc123",
+        "event": "Winter Weather Advisory",
+        "headline": "Winter Weather Advisory issued January 17 at 8:05AM CST",
+        "severity": "Moderate",
+        "description": "Mixed precipitation expected...",
+        "expires": "2026-01-18T06:00:00Z"
+      }
+    ]
+  }
+}
+```

Dockerfile

@@ -0,0 +1,78 @@
+# syntax=docker/dockerfile:1.6
+
+ARG GO_VERSION=1.25
+
+############################
+# Build stage
+############################
+FROM harbor.maximumdirect.net/proxy-dockerhub/golang:${GO_VERSION}-bookworm AS build
+
+WORKDIR /src
+
+# Install baseline packages
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      ca-certificates tzdata git build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Cache dependencies first
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download
+
+# Copy the rest of the source
+COPY . .
+
+# Ensure go.sum is complete after dropping the replace
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build
+
+# Default to a static build (no CGO)
+# If errors, can build with: --build-arg CGO_ENABLED=1
+ARG CGO_ENABLED=0
+ARG TARGETOS=linux
+ARG TARGETARCH=amd64
+ENV CGO_ENABLED=${CGO_ENABLED} \
+    GOOS=${TARGETOS} \
+    GOARCH=${TARGETARCH}
+
+# Run tests before building the final binary
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    go test ./...
+
+# Build the cmd entrypoint
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    go build \
+      -trimpath \
+      -ldflags="-s -w" \
+      -o /out/weatherfeeder \
+      ./cmd/weatherfeeder
+
+
+############################
+# Runtime stage
+############################
+FROM harbor.maximumdirect.net/proxy-dockerhub/debian:bookworm-slim AS runtime
+
+# Install runtime necessities
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      ca-certificates tzdata curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Define /weatherfeeder as the working directory
+WORKDIR /weatherfeeder
+
+# Create an unprivileged user
+RUN useradd \
+      --uid 10001 \
+      --no-create-home \
+      --shell /usr/sbin/nologin \
+      weatherfeeder
+
+# Copy the binary
+COPY --chown=weatherfeeder:weatherfeeder --from=build /out/weatherfeeder /weatherfeeder/weatherfeeder
+
+USER weatherfeeder
+
+# The application expects config.yml in the same directory as the binary
+ENTRYPOINT ["/weatherfeeder/weatherfeeder"]

README.md

@@ -1,3 +1,34 @@
 # weatherfeeder
 
-A small daemon to poll weather observations, alerts, and forecasts from a variety of sources. 
+weatherfeeder is a small daemon that polls weather observations, forecasts, and alerts from multiple upstream
+providers, normalizes them into a provider-independent format, and emits them to a sink.
+
+Today, the only implemented sink is `stdout`, which prints JSON-encoded events.
+
+## What weatherfeeder emits
+
+weatherfeeder emits **feed events** encoded as JSON. Each event includes a schema identifier and a payload.
+Downstream consumers should key off the `schema` value and decode the `payload` accordingly.
+
+Canonical domain schemas emitted after normalization:
+
+- `weather.observation.v1` → `WeatherObservation`
+- `weather.forecast.v1` → `WeatherForecastRun`
+- `weather.alert.v1` → `WeatherAlertRun`
+
+For the complete wire contract (event envelope + payload schemas, fields, units, and compatibility rules), see:
+
+- **API.md**
+
+## Upstream providers (current MVP)
+
+- NWS: observations, hourly forecasts, alerts
+- Open-Meteo: observations, hourly forecasts
+- OpenWeather: observations
+
+## Versioning & compatibility
+
+The JSON field names on canonical payload types are treated as part of the wire contract.
+Additive changes are preferred. Renames/removals require a schema version bump.
+
+See **API.md** for details.

cmd/weatherfeeder/config.yml

@@ -3,31 +3,31 @@ sources:
   - name: NWSObservationKSTL
     kind: observation
     driver: nws_observation
-    every: 12m
+    every: 10m
     params:
       url: "https://api.weather.gov/stations/KSTL/observations/latest"
       user_agent: "HomeOps (eric@maximumdirect.net)"
 
-  - name: OpenMeteoObservation
+#  - name: OpenMeteoObservation
-    kind: observation
+#    kind: observation
-    driver: openmeteo_observation
+#    driver: openmeteo_observation
-    every: 12m
+#    every: 10m
-    params:
+#    params:
-      url: "https://api.open-meteo.com/v1/forecast?latitude=38.6239&longitude=-90.3571&current=temperature_2m,relative_humidity_2m,weather_code,wind_speed_10m,wind_direction_10m,precipitation,surface_pressure,rain,showers,snowfall,cloud_cover,apparent_temperature,is_day,wind_gusts_10m,pressure_msl&forecast_days=1"
+#      url: "https://api.open-meteo.com/v1/forecast?latitude=38.6239&longitude=-90.3571&current=temperature_2m,relative_humidity_2m,weather_code,wind_speed_10m,wind_direction_10m,precipitation,surface_pressure,rain,showers,snowfall,cloud_cover,apparent_temperature,is_day,wind_gusts_10m,pressure_msl&forecast_days=1"
-      user_agent: "HomeOps (eric@maximumdirect.net)"
+#      user_agent: "HomeOps (eric@maximumdirect.net)"
 
-  - name: OpenWeatherObservation
+#  - name: OpenWeatherObservation
-    kind: observation
+#    kind: observation
-    driver: openweather_observation
+#    driver: openweather_observation
-    every: 12m
+#    every: 10m
-    params:
+#    params:
-      url: "https://api.openweathermap.org/data/2.5/weather?lat=38.6239&lon=-90.3571&appid=c954f2566cb7ccb56b43737b52e88fc6&units=metric"
+#      url: "https://api.openweathermap.org/data/2.5/weather?lat=38.6239&lon=-90.3571&appid=c954f2566cb7ccb56b43737b52e88fc6&units=metric"
-      user_agent: "HomeOps (eric@maximumdirect.net)"
+#      user_agent: "HomeOps (eric@maximumdirect.net)"
 
 #  - name: NWSObservationKSUS
 #    kind: observation
 #    driver: nws_observation
-#    every: 18s
+#    every: 10m
 #    params:
 #      url: "https://api.weather.gov/stations/KSUS/observations/latest"
 #      user_agent: "HomeOps (eric@maximumdirect.net)"
@@ -35,24 +35,46 @@ sources:
 #  - name: NWSObservationKCPS
 #    kind: observation
 #    driver: nws_observation
-#    every: 12m
+#    every: 10m
 #    params:
 #      url: "https://api.weather.gov/stations/KCPS/observations/latest"
 #      user_agent: "HomeOps (eric@maximumdirect.net)"
 
-#  - name: NWSAlertsSTL
+  - name: NWSHourlyForecastSTL
-#    kind: alert
+    kind: forecast
-#    driver: nws_alerts
+    driver: nws_forecast
-#    every: 1m
+    every: 45m
-#    params:
+    params:
-#      url: "https://api.weather.gov/alerts?point=38.6239,-90.3571&limit=500"
+      url: "https://api.weather.gov/gridpoints/LSX/90,74/forecast/hourly"
-#      user_agent: "HomeOps (eric@maximumdirect.net)"
+      user_agent: "HomeOps (eric@maximumdirect.net)"
+
+  - name: OpenMeteoHourlyForecastSTL
+    kind: forecast
+    driver: openmeteo_forecast
+    every: 60m
+    params:
+      url: https://api.open-meteo.com/v1/forecast?latitude=38.6239&longitude=-90.3571&hourly=temperature_2m,relative_humidity_2m,dew_point_2m,apparent_temperature,precipitation_probability,precipitation,snowfall,weather_code,surface_pressure,wind_speed_10m,wind_direction_10m&forecast_days=3
+      user_agent: "HomeOps (eric@maximumdirect.net)"
+
+  - name: NWSAlertsSTL
+    kind: alert
+    driver: nws_alerts
+    every: 1m
+    params:
+      url: "https://api.weather.gov/alerts?point=38.6239,-90.3571&limit=20"
+      user_agent: "HomeOps (eric@maximumdirect.net)"
 
 sinks:
   - name: stdout
     driver: stdout
     params: {}
 
+  - name: nats_weatherfeeder
+    driver: nats
+    params:
+      url: nats://nats:4222
+      exchange: weatherfeeder
+
 #  - name: logfile
 #    driver: file
 #    params:
@@ -60,7 +82,10 @@ sinks:
 
 routes:
   - sink: stdout
-    kinds: ["observation"]
+    kinds: ["observation", "forecast", "alert"]
+
+  - sink: nats_weatherfeeder
+    kinds: ["observation", "forecast", "alert"]
 
 #  - sink: logfile
 #    kinds: ["observation", "alert", "forecast"]

cmd/weatherfeeder/main.go

@@ -40,12 +40,17 @@ func main() {
 	srcReg := fksources.NewRegistry()
 	wfsources.RegisterBuiltins(srcReg)
 
-	// Minimal sink set to compile: stdout only.
+	// Compile stdout, Postgres, and NATS sinks for weatherfeeder. The former is useful for debugging and the latter are the main intended outputs.
 	sinkReg := fksinks.NewRegistry()
 	sinkReg.Register("stdout", func(cfg config.SinkConfig) (fksinks.Sink, error) {
 		return fksinks.NewStdoutSink(cfg.Name), nil
 	})
-
+	sinkReg.Register("postgres", func(cfg config.SinkConfig) (fksinks.Sink, error) {
+		return fksinks.NewPostgresSinkFromConfig(cfg)
+	})
+	sinkReg.Register("nats", func(cfg config.SinkConfig) (fksinks.Sink, error) {
+		return fksinks.NewNATSSinkFromConfig(cfg)
+	})
 	// --- Build sources into scheduler jobs ---
 	var jobs []fkscheduler.Job
 	for i, sc := range cfg.Sources {

go.mod

@@ -1,9 +1,15 @@
 module gitea.maximumdirect.net/ejr/weatherfeeder
 
-go 1.22
+go 1.25
 
-require gitea.maximumdirect.net/ejr/feedkit v0.0.0
+require gitea.maximumdirect.net/ejr/feedkit v0.4.1
 
-require gopkg.in/yaml.v3 v3.0.1 // indirect
+require (
-
+	github.com/klauspost/compress v1.17.2 // indirect
-replace gitea.maximumdirect.net/ejr/feedkit => ../feedkit
+	github.com/nats-io/nats.go v1.34.0 // indirect
+	github.com/nats-io/nkeys v0.4.7 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
+	golang.org/x/crypto v0.18.0 // indirect
+	golang.org/x/sys v0.16.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -1,3 +1,17 @@
+gitea.maximumdirect.net/ejr/feedkit v0.4.1 h1:mMFtPCBKp2LXV3euPH21WzjHku/HHx31KQqYW+w1aqU=
+gitea.maximumdirect.net/ejr/feedkit v0.4.1/go.mod h1:wYtA10GouvSe7L/8e1UEC+tqcp32HJofExIo1k+Wjls=
+github.com/klauspost/compress v1.17.2 h1:RlWWUY/Dr4fL8qk9YG7DTZ7PDgME2V4csBXA8L/ixi4=
+github.com/klauspost/compress v1.17.2/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
+github.com/nats-io/nats.go v1.34.0 h1:fnxnPCNiwIG5w08rlMcEKTUw4AV/nKyGCOJE8TdhSPk=
+github.com/nats-io/nats.go v1.34.0/go.mod h1:Ubdu4Nh9exXdSz0RVWRFBbRfrbSxOYd26oF0wkWclB8=
+github.com/nats-io/nkeys v0.4.7 h1:RwNJbbIdYCoClSDNY7QVKZlyb/wfT6ugvFCiKy6vDvI=
+github.com/nats-io/nkeys v0.4.7/go.mod h1:kqXRgRDPlGy7nGaEDMuYzmiJCIAAWDK0IMBtDmGD0nc=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
+golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
+golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
+golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
+golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

internal/model/alert.go

@@ -1,23 +0,0 @@
-package model
-
-import "time"
-
-// Placeholder for NWS alerts (GeoJSON feature properties are rich).
-type WeatherAlert struct {
-	ID string
-
-	Event       string
-	Headline    string
-	Description string
-	Instruction string
-
-	Severity  string
-	Urgency   string
-	Certainty string
-
-	Sent      *time.Time
-	Effective *time.Time
-	Expires   *time.Time
-
-	Areas []string
-}

internal/model/forecast.go

@@ -1,17 +0,0 @@
-package model
-
-import "time"
-
-// WeatherForecast identity fields (as you described).
-type WeatherForecast struct {
-	IssuedBy      string    // e.g. "NWS"
-	IssuedAt      time.Time // when forecast product was issued
-	ForecastType  string    // e.g. "hourly", "daily"
-	ForecastStart time.Time // start of the applicable forecast period
-
-	// TODO: You’ll likely want ForecastEnd too.
-
-	// TODO: Add meteorological fields you care about.
-	// Temperature, precip probability, wind, etc.
-	// Decide if you want a single "period" model or an array of periods.
-}

internal/model/observation.go

@@ -1,72 +0,0 @@
-package model
-
-import "time"
-
-type WeatherObservation struct {
-	// Identity / metadata
-	StationID   string
-	StationName string
-	Timestamp   time.Time
-
-	// Canonical internal representation (provider-independent).
-	//
-	// ConditionCode should be populated by all sources. ConditionText should be the
-	// canonical human-readable string derived from the WMO code (not the provider's
-	// original wording).
-	//
-	// IsDay is optional; some providers supply a day/night flag (e.g., Open-Meteo),
-	// while others may not (e.g., NWS observations). When unknown, it can be nil.
-	ConditionCode WMOCode
-	ConditionText string
-	IsDay         *bool
-
-	// Provider-specific “evidence” for troubleshooting mapping and drift.
-	//
-	// This is intentionally limited: it is not intended to be used downstream for
-	// business logic. Downstream logic should rely on ConditionCode / ConditionText.
-	ProviderRawDescription string
-
-	// Human-facing (legacy / transitional)
-	//
-	// TextDescription currently carries provider text in existing drivers.
-	// As we transition to WMO-based normalization, downstream presentation should
-	// switch to using ConditionText. After migration, this may be removed or repurposed.
-	TextDescription string
-
-	// Provider-specific (legacy / transitional)
-	//
-	// IconURL is not part of the canonical internal vocabulary. It's retained only
-	// because current sources populate it; it is not required for downstream systems.
-	IconURL string
-
-	// Core measurements (nullable)
-	TemperatureC *float64
-	DewpointC    *float64
-
-	WindDirectionDegrees *float64
-	WindSpeedKmh         *float64
-	WindGustKmh          *float64
-
-	BarometricPressurePa *float64
-	SeaLevelPressurePa   *float64
-	VisibilityMeters     *float64
-
-	RelativeHumidityPercent *float64
-	WindChillC              *float64
-	HeatIndexC              *float64
-
-	ElevationMeters *float64
-	RawMessage      string
-
-	PresentWeather []PresentWeather
-	CloudLayers    []CloudLayer
-}
-
-type CloudLayer struct {
-	BaseMeters *float64
-	Amount     string
-}
-
-type PresentWeather struct {
-	Raw map[string]any
-}

internal/normalizers/common/doc.go

@@ -11,39 +11,9 @@
 //   - minimal abstractions (prefer straightforward functions)
 //   - easy to unit test
 //
-// What belongs here
+// Numeric wire policy
-// -----------------
+// -------------------
-// Put code in internal/normalizers/common when it is:
+// Canonical payloads are intended for sinks/serialization. To keep output stable and readable,
-//
+// weatherfeeder rounds floating-point values in canonical payloads to a small, fixed precision
-//   - potentially reusable by more than one provider
+// at finalization time (see round.go).
-//   - provider-agnostic (no NWS/OpenWeather/Open-Meteo specific assumptions)
-//   - stable, small, and readable
-//
-// Typical examples:
-//   - unit conversion helpers (°F <-> °C, m/s <-> km/h, hPa <-> Pa, etc.)
-//   - json.RawMessage payload extraction helpers (with good error messages)
-//   - shared parsing helpers (timestamps, simple numeric coercions)
-//   - generic fallbacks (e.g., mapping a human text description into a coarse canonical code),
-//     so long as the logic truly applies across providers
-//
-// What does NOT belong here
-// -------------------------
-// Do NOT put the following in this package:
-//
-//   - Normalizer implementations (types that satisfy feedkit/normalize.Normalizer)
-//   - provider-specific JSON structs or mapping logic (put those under
-//     internal/normalizers/<provider>/)
-//   - network or filesystem I/O (sources fetch; normalizers transform)
-//   - code that depends on event.Source naming, config fields, or driver-specific params
-//
-// Style and API guidelines
-// ------------------------
-//   - Prefer small, single-purpose functions.
-//   - Keep function names explicit (avoid clever generic “DoThing” helpers).
-//   - Return typed errors with context (include schema/field names where helpful).
-//   - Keep dependencies minimal: standard library + weatherfeeder packages only.
-//   - Add unit tests for any non-trivial logic (especially parsing and fallbacks).
-//
-// Keeping this clean matters: common is shared by all providers, so complexity here
-// multiplies across the project.
 package common

internal/normalizers/common/finalize.go

@@ -14,10 +14,13 @@ import (
 //   - ID/Kind/Source/EmittedAt are preserved by copying the input event.
 //   - EffectiveAt is only overwritten when effectiveAt is non-zero.
 //     If effectiveAt is zero, any existing in.EffectiveAt is preserved.
+//   - Payload floats are rounded to a stable wire-friendly precision (see round.go).
 func Finalize(in event.Event, outSchema string, outPayload any, effectiveAt time.Time) (*event.Event, error) {
 	out := in
 	out.Schema = outSchema
-	out.Payload = outPayload
+
+	// Enforce stable numeric presentation for sinks: round floats in the canonical payload.
+	out.Payload = RoundFloats(outPayload, DefaultFloatPrecision)
 
 	if !effectiveAt.IsZero() {
 		t := effectiveAt.UTC()

internal/normalizers/common/id.go

@@ -0,0 +1,23 @@
+// FILE: internal/normalizers/common/id.go
+package common
+
+import "fmt"
+
+// SynthStationID formats a stable synthetic station identifier for providers that are
+// coordinate-based rather than station-based.
+//
+// Example output:
+//
+//	OPENMETEO(38.62700,-90.19940)
+func SynthStationID(prefix string, lat, lon float64) string {
+	return fmt.Sprintf("%s(%.5f,%.5f)", prefix, lat, lon)
+}
+
+// SynthStationIDPtr is the pointer-friendly variant.
+// If either coordinate is missing, it returns "" (unknown).
+func SynthStationIDPtr(prefix string, lat, lon *float64) string {
+	if lat == nil || lon == nil {
+		return ""
+	}
+	return SynthStationID(prefix, *lat, *lon)
+}

internal/normalizers/common/json.go

@@ -42,6 +42,10 @@ func DecodeJSONPayload[T any](in event.Event) (T, error) {
 // label should be short and specific, e.g. "openweather observation".
 // outSchema should be the canonical schema constant.
 // build should contain ONLY provider/domain mapping logic.
+//
+// Error policy:
+//   - NormalizeJSON wraps ALL failures with consistent context: "<label> normalize: <stage>: ..."
+//   - build() should return specific errors without repeating the label prefix.
 func NormalizeJSON[T any, P any](
 	in event.Event,
 	label string,
@@ -55,8 +59,7 @@ func NormalizeJSON[T any, P any](
 
 	payload, effectiveAt, err := build(parsed)
 	if err != nil {
-		// build() should already include provider-specific context where appropriate.
+		return nil, fmt.Errorf("%s normalize: build: %w", label, err)
-		return nil, err
 	}
 
 	out, err := Finalize(in, outSchema, payload, effectiveAt)

internal/normalizers/common/round.go

@@ -0,0 +1,212 @@
+// FILE: ./internal/normalizers/common/round.go
+package common
+
+import (
+	"math"
+	"reflect"
+)
+
+// DefaultFloatPrecision is the project-wide wire-format policy for floating-point
+// values in canonical payloads (weather.* schemas).
+//
+// Note: encoding/json will not necessarily print trailing zeros (e.g. 1.50 -> 1.5),
+// but values will be *rounded* to this number of digits after the decimal point.
+const DefaultFloatPrecision = 4
+
+// RoundFloats returns a copy of v with all float32/float64 values (including pointers,
+// slices, arrays, maps, and nested exported-struct fields) rounded to `decimals` digits
+// after the decimal point.
+//
+// This is a best-effort helper meant for presentation stability. If reflection hits an
+// unsupported/opaque type (e.g. structs with unexported fields like time.Time), that
+// subtree is left unchanged.
+func RoundFloats(v any, decimals int) any {
+	if v == nil || decimals < 0 {
+		return v
+	}
+
+	defer func() {
+		// Never let presentation formatting crash the pipeline.
+		_ = recover()
+	}()
+
+	rv := reflect.ValueOf(v)
+	out := roundValue(rv, decimals)
+	if !out.IsValid() {
+		return v
+	}
+	return out.Interface()
+}
+
+func roundValue(v reflect.Value, decimals int) reflect.Value {
+	if !v.IsValid() {
+		return v
+	}
+
+	// Unwrap interfaces.
+	if v.Kind() == reflect.Interface {
+		if v.IsNil() {
+			return v
+		}
+		elem := roundValue(v.Elem(), decimals)
+
+		// Re-wrap in the same interface type.
+		out := reflect.New(v.Type()).Elem()
+		if elem.IsValid() && elem.Type().AssignableTo(v.Type()) {
+			out.Set(elem)
+			return out
+		}
+		if elem.IsValid() && elem.Type().ConvertibleTo(v.Type()) {
+			out.Set(elem.Convert(v.Type()))
+			return out
+		}
+
+		// If we can't sensibly re-wrap, just keep the original.
+		return v
+	}
+
+	// Copy pointers (and round their targets).
+	if v.Kind() == reflect.Pointer {
+		if v.IsNil() {
+			return v
+		}
+
+		// If the pointed-to type is an opaque struct (e.g. time.Time), keep as-is.
+		if v.Elem().Kind() == reflect.Struct && isOpaqueStruct(v.Elem().Type()) {
+			return v
+		}
+
+		elem := roundValue(v.Elem(), decimals)
+		p := reflect.New(v.Type().Elem())
+		if elem.IsValid() && elem.Type().AssignableTo(v.Type().Elem()) {
+			p.Elem().Set(elem)
+		} else if elem.IsValid() && elem.Type().ConvertibleTo(v.Type().Elem()) {
+			p.Elem().Set(elem.Convert(v.Type().Elem()))
+		} else {
+			p.Elem().Set(v.Elem())
+		}
+		return p
+	}
+
+	switch v.Kind() {
+	case reflect.Float32, reflect.Float64:
+		f := v.Convert(reflect.TypeOf(float64(0))).Float()
+		r := roundFloat64(f, decimals)
+		return reflect.ValueOf(r).Convert(v.Type())
+
+	case reflect.Struct:
+		// Avoid reconstructing opaque structs (time.Time has unexported fields).
+		if isOpaqueStruct(v.Type()) {
+			return v
+		}
+
+		out := reflect.New(v.Type()).Elem()
+		out.Set(v) // start from a copy, then replace rounded fields
+
+		t := v.Type()
+		for i := 0; i < v.NumField(); i++ {
+			sf := t.Field(i)
+
+			// Only exported fields are safely settable across packages.
+			if sf.PkgPath != "" {
+				continue
+			}
+
+			fv := v.Field(i)
+			rf := roundValue(fv, decimals)
+
+			of := out.Field(i)
+			if !of.CanSet() {
+				continue
+			}
+
+			if rf.IsValid() && rf.Type().AssignableTo(of.Type()) {
+				of.Set(rf)
+			} else if rf.IsValid() && rf.Type().ConvertibleTo(of.Type()) {
+				of.Set(rf.Convert(of.Type()))
+			}
+		}
+		return out
+
+	case reflect.Slice:
+		if v.IsNil() {
+			return v
+		}
+		out := reflect.MakeSlice(v.Type(), v.Len(), v.Len())
+		for i := 0; i < v.Len(); i++ {
+			ev := v.Index(i)
+			re := roundValue(ev, decimals)
+			if re.IsValid() && re.Type().AssignableTo(out.Index(i).Type()) {
+				out.Index(i).Set(re)
+			} else if re.IsValid() && re.Type().ConvertibleTo(out.Index(i).Type()) {
+				out.Index(i).Set(re.Convert(out.Index(i).Type()))
+			} else {
+				out.Index(i).Set(ev)
+			}
+		}
+		return out
+
+	case reflect.Array:
+		out := reflect.New(v.Type()).Elem()
+		out.Set(v)
+		for i := 0; i < v.Len(); i++ {
+			ev := v.Index(i)
+			re := roundValue(ev, decimals)
+			if re.IsValid() && re.Type().AssignableTo(out.Index(i).Type()) {
+				out.Index(i).Set(re)
+			} else if re.IsValid() && re.Type().ConvertibleTo(out.Index(i).Type()) {
+				out.Index(i).Set(re.Convert(out.Index(i).Type()))
+			} else {
+				out.Index(i).Set(ev)
+			}
+		}
+		return out
+
+	case reflect.Map:
+		if v.IsNil() {
+			return v
+		}
+		out := reflect.MakeMapWithSize(v.Type(), v.Len())
+		iter := v.MapRange()
+		for iter.Next() {
+			k := iter.Key()
+			mv := iter.Value()
+			rv := roundValue(mv, decimals)
+
+			if rv.IsValid() && rv.Type().AssignableTo(v.Type().Elem()) {
+				out.SetMapIndex(k, rv)
+			} else if rv.IsValid() && rv.Type().ConvertibleTo(v.Type().Elem()) {
+				out.SetMapIndex(k, rv.Convert(v.Type().Elem()))
+			} else {
+				out.SetMapIndex(k, mv)
+			}
+		}
+		return out
+
+	default:
+		// ints, strings, bools, time.Time (handled as opaque), etc.
+		return v
+	}
+}
+
+func roundFloat64(f float64, decimals int) float64 {
+	if decimals <= 0 {
+		return math.Round(f)
+	}
+	pow := math.Pow10(decimals)
+	return math.Round(f*pow) / pow
+}
+
+// isOpaqueStruct returns true for structs that are unsafe/unhelpful to reconstruct via reflection.
+// Any struct containing unexported fields (e.g. time.Time) is treated as opaque.
+func isOpaqueStruct(t reflect.Type) bool {
+	if t.Kind() != reflect.Struct {
+		return false
+	}
+	for i := 0; i < t.NumField(); i++ {
+		if t.Field(i).PkgPath != "" {
+			return true
+		}
+	}
+	return false
+}

internal/normalizers/common/wmo_text.go

@@ -4,7 +4,7 @@ package common
 import (
 	"strings"
 
-	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 // WMOFromTextDescription is a cross-provider fallback that tries to infer a WMO code

internal/normalizers/doc.go

@@ -34,14 +34,16 @@
 //     as they do not define additional Normalizer types.
 //
 //  2. Provider-level shared helpers live under the provider directory:
-//     internal/normalizers/<provider>/
+//     internal/providers/<provider>/
+//
+//     Use this for provider-specific quirks that should be shared by BOTH sources
+//     and normalizers (time parsing, URL/unit invariants, ID normalization, etc.).
+//     Keep these helpers pure (no I/O) and easy to test.
 //
 //     You may use multiple helper files (recommended) when it improves clarity:
 //     - types.go        (provider JSON structs)
 //     - common.go       (provider-shared helpers)
 //     - mapping.go      (provider mapping logic)
-//     Use common.go only when you truly have “shared across multiple normalizers
-//     within this provider” helpers.
 //
 //  3. Cross-provider helpers live in:
 //     internal/normalizers/common/

internal/normalizers/nws/alerts.go

@@ -0,0 +1,238 @@
+// FILE: internal/normalizers/nws/alerts.go
+package nws
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+
+	"gitea.maximumdirect.net/ejr/feedkit/event"
+	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
+)
+
+// AlertsNormalizer converts:
+//
+//	standards.SchemaRawNWSAlertsV1 -> standards.SchemaWeatherAlertV1
+//
+// It interprets NWS /alerts FeatureCollection payloads (GeoJSON-ish) and maps them into
+// the canonical model.WeatherAlertRun representation.
+//
+// Caveats / policy:
+//  1. Run.AsOf prefers the collection-level "updated" timestamp. If missing/unparseable,
+//     we fall back to the latest per-alert timestamp, and then to the input event’s
+//     EffectiveAt/EmittedAt.
+//  2. Alert timing fields are best-effort parsed; invalid timestamps do not fail the
+//     entire normalization (they are left nil).
+//  3. Some fields are intentionally passed through as strings (severity/urgency/etc.)
+//     since canonical vocabularies may evolve later.
+type AlertsNormalizer struct{}
+
+func (AlertsNormalizer) Match(e event.Event) bool {
+	return strings.TrimSpace(e.Schema) == standards.SchemaRawNWSAlertsV1
+}
+
+func (AlertsNormalizer) Normalize(ctx context.Context, in event.Event) (*event.Event, error) {
+	_ = ctx // normalization is pure/CPU; keep ctx for future expensive steps
+
+	// If we can't derive AsOf from the payload, fall back to the existing event envelope.
+	fallbackAsOf := in.EmittedAt.UTC()
+	if in.EffectiveAt != nil && !in.EffectiveAt.IsZero() {
+		fallbackAsOf = in.EffectiveAt.UTC()
+	}
+
+	return normcommon.NormalizeJSON(
+		in,
+		"nws alerts",
+		standards.SchemaWeatherAlertV1,
+		func(parsed nwsAlertsResponse) (model.WeatherAlertRun, time.Time, error) {
+			return buildAlerts(parsed, fallbackAsOf)
+		},
+	)
+}
+
+// buildAlerts contains the domain mapping logic (provider -> canonical model).
+func buildAlerts(parsed nwsAlertsResponse, fallbackAsOf time.Time) (model.WeatherAlertRun, time.Time, error) {
+	// 1) Determine AsOf (required by canonical model; also used as EffectiveAt).
+	asOf := nwscommon.ParseTimeBestEffort(parsed.Updated)
+	if asOf.IsZero() {
+		asOf = latestAlertTimestamp(parsed.Features)
+	}
+	if asOf.IsZero() {
+		asOf = fallbackAsOf.UTC()
+	}
+
+	run := model.WeatherAlertRun{
+		LocationID:   "",
+		LocationName: strings.TrimSpace(parsed.Title),
+
+		AsOf: asOf,
+
+		Latitude:  nil,
+		Longitude: nil,
+
+		Alerts: nil,
+	}
+
+	// 2) Map each feature into a canonical WeatherAlert.
+	alerts := make([]model.WeatherAlert, 0, len(parsed.Features))
+	for i, f := range parsed.Features {
+		p := f.Properties
+
+		id := firstNonEmpty(strings.TrimSpace(f.ID), strings.TrimSpace(p.ID), strings.TrimSpace(p.Identifier))
+		if id == "" {
+			// NWS usually supplies an ID, but be defensive. Prefer a stable-ish synth ID.
+			// Include the run as-of time to reduce collisions across snapshots.
+			id = fmt.Sprintf("nws:alert:%s:%d", asOf.UTC().Format(time.RFC3339Nano), i)
+		}
+
+		sent := nwscommon.ParseTimePtr(p.Sent)
+		effective := nwscommon.ParseTimePtr(p.Effective)
+		onset := nwscommon.ParseTimePtr(p.Onset)
+
+		// Expires: prefer "expires"; fall back to "ends" if present.
+		expires := nwscommon.ParseTimePtr(p.Expires)
+		if expires == nil {
+			expires = nwscommon.ParseTimePtr(p.Ends)
+		}
+
+		refs := parseNWSAlertReferences(p.References)
+
+		alert := model.WeatherAlert{
+			ID: id,
+
+			Event:    strings.TrimSpace(p.Event),
+			Headline: strings.TrimSpace(p.Headline),
+
+			Severity:  strings.TrimSpace(p.Severity),
+			Urgency:   strings.TrimSpace(p.Urgency),
+			Certainty: strings.TrimSpace(p.Certainty),
+
+			Status:      strings.TrimSpace(p.Status),
+			MessageType: strings.TrimSpace(p.MessageType),
+			Category:    strings.TrimSpace(p.Category),
+			Response:    strings.TrimSpace(p.Response),
+
+			Description: strings.TrimSpace(p.Description),
+			Instruction: strings.TrimSpace(p.Instruction),
+
+			Sent:      sent,
+			Effective: effective,
+			Onset:     onset,
+			Expires:   expires,
+
+			AreaDescription: strings.TrimSpace(p.AreaDesc),
+
+			SenderName: firstNonEmpty(strings.TrimSpace(p.SenderName), strings.TrimSpace(p.Sender)),
+
+			References: refs,
+		}
+
+		// Headline fallback (NWS commonly provides it, but not guaranteed).
+		if alert.Headline == "" {
+			alert.Headline = alert.Event
+		}
+
+		alerts = append(alerts, alert)
+	}
+
+	run.Alerts = alerts
+
+	// EffectiveAt policy for alerts: treat AsOf as the effective time (dedupe-friendly).
+	return run, asOf, nil
+}
+
+// latestAlertTimestamp scans alert features for the most recent timestamp.
+// It prefers Sent/Effective, and falls back to Expires/Ends when needed.
+func latestAlertTimestamp(features []nwsAlertFeature) time.Time {
+	var latest time.Time
+	for _, f := range features {
+		p := f.Properties
+		candidates := []string{
+			p.Sent,
+			p.Effective,
+			p.Expires,
+			p.Ends,
+			p.Onset,
+		}
+		for _, s := range candidates {
+			t := nwscommon.ParseTimeBestEffort(s)
+			if t.IsZero() {
+				continue
+			}
+			if latest.IsZero() || t.After(latest) {
+				latest = t
+			}
+		}
+	}
+	return latest
+}
+
+func firstNonEmpty(vals ...string) string {
+	for _, v := range vals {
+		if strings.TrimSpace(v) != "" {
+			return strings.TrimSpace(v)
+		}
+	}
+	return ""
+}
+
+// parseNWSAlertReferences tries to interpret the NWS "references" field, which may
+// vary by endpoint/version. We accept the common object-array form and a few
+// degraded shapes (string array / single string).
+func parseNWSAlertReferences(raw json.RawMessage) []model.AlertReference {
+	if len(raw) == 0 {
+		return nil
+	}
+
+	// Most common: array of objects.
+	var objs []nwsAlertReference
+	if err := json.Unmarshal(raw, &objs); err == nil && len(objs) > 0 {
+		out := make([]model.AlertReference, 0, len(objs))
+		for _, r := range objs {
+			ref := model.AlertReference{
+				ID:         strings.TrimSpace(r.ID),
+				Identifier: strings.TrimSpace(r.Identifier),
+				Sender:     strings.TrimSpace(r.Sender),
+				Sent:       nwscommon.ParseTimePtr(r.Sent),
+			}
+			// If only Identifier is present, preserve it as ID too (useful downstream).
+			if ref.ID == "" && ref.Identifier != "" {
+				ref.ID = ref.Identifier
+			}
+			out = append(out, ref)
+		}
+		return out
+	}
+
+	// Sometimes: array of strings.
+	var strs []string
+	if err := json.Unmarshal(raw, &strs); err == nil && len(strs) > 0 {
+		out := make([]model.AlertReference, 0, len(strs))
+		for _, s := range strs {
+			id := strings.TrimSpace(s)
+			if id == "" {
+				continue
+			}
+			out = append(out, model.AlertReference{ID: id})
+		}
+		if len(out) > 0 {
+			return out
+		}
+	}
+
+	// Rare: single string.
+	var single string
+	if err := json.Unmarshal(raw, &single); err == nil {
+		id := strings.TrimSpace(single)
+		if id != "" {
+			return []model.AlertReference{{ID: id}}
+		}
+	}
+
+	return nil
+}

internal/normalizers/nws/day_night.go

@@ -0,0 +1,74 @@
+// FILE: internal/normalizers/nws/day_night.go
+package nws
+
+import (
+	"math"
+	"time"
+)
+
+const (
+	degToRad = math.Pi / 180.0
+	radToDeg = 180.0 / math.Pi
+)
+
+func observationLatLon(coords []float64) (lat *float64, lon *float64) {
+	if len(coords) < 2 {
+		return nil, nil
+	}
+	latVal := coords[1]
+	lonVal := coords[0]
+	return &latVal, &lonVal
+}
+
+// isDayFromLatLonTime estimates day/night from solar elevation.
+// Uses a refraction-adjusted cutoff (-0.833 degrees).
+func isDayFromLatLonTime(lat, lon float64, ts time.Time) *bool {
+	if ts.IsZero() || math.IsNaN(lat) || math.IsNaN(lon) || math.IsInf(lat, 0) || math.IsInf(lon, 0) {
+		return nil
+	}
+	if lat < -90.0 || lat > 90.0 || lon < -180.0 || lon > 180.0 {
+		return nil
+	}
+
+	t := ts.UTC()
+	day := float64(t.YearDay())
+	hour := float64(t.Hour())
+	min := float64(t.Minute())
+	sec := float64(t.Second()) + float64(t.Nanosecond())/1e9
+	utcHours := hour + min/60.0 + sec/3600.0
+
+	gamma := 2.0 * math.Pi / 365.0 * (day - 1.0 + (utcHours-12.0)/24.0)
+
+	eqtime := 229.18 * (0.000075 + 0.001868*math.Cos(gamma) - 0.032077*math.Sin(gamma) -
+		0.014615*math.Cos(2.0*gamma) - 0.040849*math.Sin(2.0*gamma))
+
+	decl := 0.006918 - 0.399912*math.Cos(gamma) + 0.070257*math.Sin(gamma) -
+		0.006758*math.Cos(2.0*gamma) + 0.000907*math.Sin(2.0*gamma) -
+		0.002697*math.Cos(3.0*gamma) + 0.00148*math.Sin(3.0*gamma)
+
+	timeOffset := eqtime + 4.0*lon
+	trueSolarMinutes := hour*60.0 + min + sec/60.0 + timeOffset
+	for trueSolarMinutes < 0 {
+		trueSolarMinutes += 1440.0
+	}
+	for trueSolarMinutes >= 1440.0 {
+		trueSolarMinutes -= 1440.0
+	}
+
+	hourAngleDeg := trueSolarMinutes/4.0 - 180.0
+	ha := hourAngleDeg * degToRad
+	latRad := lat * degToRad
+
+	cosZenith := math.Sin(latRad)*math.Sin(decl) + math.Cos(latRad)*math.Cos(decl)*math.Cos(ha)
+	if cosZenith > 1.0 {
+		cosZenith = 1.0
+	} else if cosZenith < -1.0 {
+		cosZenith = -1.0
+	}
+
+	zenith := math.Acos(cosZenith)
+	elevation := 90.0 - zenith*radToDeg
+
+	isDay := elevation > -0.833
+	return &isDay
+}

internal/normalizers/nws/forecast.go

@@ -0,0 +1,159 @@
+// FILE: internal/normalizers/nws/forecast.go
+package nws
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"gitea.maximumdirect.net/ejr/feedkit/event"
+	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
+)
+
+// ForecastNormalizer converts:
+//
+//	standards.SchemaRawNWSHourlyForecastV1 -> standards.SchemaWeatherForecastV1
+//
+// It interprets NWS GeoJSON gridpoint *hourly* forecast responses and maps them into
+// the canonical model.WeatherForecastRun representation.
+//
+// Caveats / policy:
+//  1. NWS forecast periods do not include METAR presentWeather phenomena, so ConditionCode
+//     is inferred from period.shortForecast (with a conservative icon-based fallback).
+//  2. Temperature is converted to °C when NWS supplies °F.
+//  3. WindSpeed is parsed from strings like "9 mph" / "10 to 15 mph" and converted to km/h.
+type ForecastNormalizer struct{}
+
+func (ForecastNormalizer) Match(e event.Event) bool {
+	s := strings.TrimSpace(e.Schema)
+	return s == standards.SchemaRawNWSHourlyForecastV1
+}
+
+func (ForecastNormalizer) Normalize(ctx context.Context, in event.Event) (*event.Event, error) {
+	_ = ctx // normalization is pure/CPU; keep ctx for future expensive steps
+
+	return normcommon.NormalizeJSON(
+		in,
+		"nws hourly forecast",
+		standards.SchemaWeatherForecastV1,
+		buildForecast,
+	)
+}
+
+// buildForecast contains the domain mapping logic (provider -> canonical model).
+func buildForecast(parsed nwsForecastResponse) (model.WeatherForecastRun, time.Time, error) {
+	// IssuedAt is required by the canonical model.
+	issuedStr := strings.TrimSpace(parsed.Properties.GeneratedAt)
+	if issuedStr == "" {
+		return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("missing properties.generatedAt")
+	}
+	issuedAt, err := nwscommon.ParseTime(issuedStr)
+	if err != nil {
+		return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("invalid properties.generatedAt %q: %w", issuedStr, err)
+	}
+	issuedAt = issuedAt.UTC()
+
+	// UpdatedAt is optional.
+	var updatedAt *time.Time
+	if s := strings.TrimSpace(parsed.Properties.UpdateTime); s != "" {
+		if t, err := nwscommon.ParseTime(s); err == nil {
+			tt := t.UTC()
+			updatedAt = &tt
+		}
+	}
+
+	// Best-effort location centroid from the GeoJSON polygon (optional).
+	lat, lon := centroidLatLon(parsed.Geometry.Coordinates)
+
+	// Schema is explicitly hourly, so product is not a heuristic.
+	run := model.WeatherForecastRun{
+		LocationID:   "",
+		LocationName: "",
+
+		IssuedAt:  issuedAt,
+		UpdatedAt: updatedAt,
+		Product:   model.ForecastProductHourly,
+
+		Latitude:        lat,
+		Longitude:       lon,
+		ElevationMeters: parsed.Properties.Elevation.Value,
+
+		Periods: nil,
+	}
+
+	periods := make([]model.WeatherForecastPeriod, 0, len(parsed.Properties.Periods))
+	for i, p := range parsed.Properties.Periods {
+		startStr := strings.TrimSpace(p.StartTime)
+		endStr := strings.TrimSpace(p.EndTime)
+
+		if startStr == "" || endStr == "" {
+			return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("periods[%d]: missing startTime/endTime", i)
+		}
+
+		start, err := nwscommon.ParseTime(startStr)
+		if err != nil {
+			return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("periods[%d].startTime invalid %q: %w", i, startStr, err)
+		}
+		end, err := nwscommon.ParseTime(endStr)
+		if err != nil {
+			return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("periods[%d].endTime invalid %q: %w", i, endStr, err)
+		}
+		start = start.UTC()
+		end = end.UTC()
+
+		// NWS hourly supplies isDaytime; make it a pointer to match the canonical model.
+		var isDay *bool
+		if p.IsDaytime != nil {
+			b := *p.IsDaytime
+			isDay = &b
+		}
+
+		tempC := tempCFromNWS(p.Temperature, p.TemperatureUnit)
+
+		// Infer WMO from shortForecast (and fall back to icon token).
+		providerDesc := strings.TrimSpace(p.ShortForecast)
+		wmo := wmoFromNWSForecast(providerDesc, p.Icon, tempC)
+
+		canonicalText := standards.WMOText(wmo, isDay)
+
+		period := model.WeatherForecastPeriod{
+			StartTime: start,
+			EndTime:   end,
+
+			Name:  strings.TrimSpace(p.Name),
+			IsDay: isDay,
+
+			ConditionCode: wmo,
+			ConditionText: canonicalText,
+
+			ProviderRawDescription: providerDesc,
+
+			// For forecasts, keep provider text as the human-facing description.
+			TextDescription: strings.TrimSpace(p.ShortForecast),
+			DetailedText:    strings.TrimSpace(p.DetailedForecast),
+
+			IconURL: strings.TrimSpace(p.Icon),
+
+			TemperatureC: tempC,
+
+			DewpointC:               p.Dewpoint.Value,
+			RelativeHumidityPercent: p.RelativeHumidity.Value,
+
+			WindDirectionDegrees: parseNWSWindDirectionDegrees(p.WindDirection),
+			WindSpeedKmh:         parseNWSWindSpeedKmh(p.WindSpeed),
+
+			ProbabilityOfPrecipitationPercent: p.ProbabilityOfPrecipitation.Value,
+		}
+
+		periods = append(periods, period)
+	}
+
+	run.Periods = periods
+
+	// EffectiveAt policy for forecasts: treat IssuedAt as the effective time (dedupe-friendly).
+	return run, issuedAt, nil
+}

internal/normalizers/nws/helpers.go

@@ -0,0 +1,235 @@
+// FILE: internal/normalizers/nws/helpers.go
+package nws
+
+import (
+	"strconv"
+	"strings"
+	"unicode"
+
+	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
+)
+
+// centroidLatLon returns a best-effort centroid (lat, lon) from a GeoJSON polygon.
+// If geometry is missing or malformed, returns (nil, nil).
+func centroidLatLon(coords [][][]float64) (lat *float64, lon *float64) {
+	if len(coords) == 0 || len(coords[0]) == 0 {
+		return nil, nil
+	}
+
+	var sumLon, sumLat float64
+	var n float64
+
+	for _, pt := range coords[0] {
+		if len(pt) < 2 {
+			continue
+		}
+		sumLon += pt[0]
+		sumLat += pt[1]
+		n++
+	}
+
+	if n == 0 {
+		return nil, nil
+	}
+
+	avgLon := sumLon / n
+	avgLat := sumLat / n
+
+	return &avgLat, &avgLon
+}
+
+func tempCFromNWS(v *float64, unit string) *float64 {
+	if v == nil {
+		return nil
+	}
+
+	u := strings.ToUpper(strings.TrimSpace(unit))
+	switch u {
+	case "F":
+		c := normcommon.TempCFromF(*v)
+		return &c
+	case "C":
+		c := *v
+		return &c
+	default:
+		// Unknown unit; be conservative.
+		return nil
+	}
+}
+
+// wmoFromNWSForecast infers a canonical WMO code for a forecast period.
+//
+// Strategy:
+//  1. Try to infer from shortForecast using the cross-provider fallback.
+//  2. Special-case mixed rain+snow using temperature when available (since our WMO table
+//     does not include a “mixed precip” code).
+//  3. Fall back to an icon token (e.g., "rain", "snow", "ovc", "bkn", "sct", ...).
+func wmoFromNWSForecast(shortForecast, iconURL string, tempC *float64) model.WMOCode {
+	sf := strings.TrimSpace(shortForecast)
+	s := strings.ToLower(sf)
+
+	// Mixed precip heuristic: choose rain vs snow based on temperature.
+	if strings.Contains(s, "rain") && strings.Contains(s, "snow") {
+		if tempC != nil && *tempC <= 0.0 {
+			return 73 // Snow
+		}
+		return 63 // Rain
+	}
+
+	if code := normcommon.WMOFromTextDescription(sf); code != model.WMOUnknown {
+		return code
+	}
+
+	// Icon fallback: token is usually the last path segment (before any comma/query).
+	if token := nwsIconToken(iconURL); token != "" {
+		// Try the general text fallback first (works for "rain", "snow", etc.).
+		if code := normcommon.WMOFromTextDescription(token); code != model.WMOUnknown {
+			return code
+		}
+
+		// Sky-condition icon tokens are common; map conservatively.
+		switch token {
+		case "ovc", "bkn", "cloudy", "ovcast":
+			return 3
+		case "sct", "bkn-sct":
+			return 2
+		case "few":
+			return 1
+		case "skc", "clr", "clear":
+			return 0
+		}
+	}
+
+	return model.WMOUnknown
+}
+
+func nwsIconToken(iconURL string) string {
+	u := strings.TrimSpace(iconURL)
+	if u == "" {
+		return ""
+	}
+
+	// Drop query string.
+	base := strings.SplitN(u, "?", 2)[0]
+
+	// Take last path segment.
+	parts := strings.Split(base, "/")
+	if len(parts) == 0 {
+		return ""
+	}
+	last := parts[len(parts)-1]
+	if last == "" && len(parts) > 1 {
+		last = parts[len(parts)-2]
+	}
+
+	// Some icons look like "rain,30" or "snow,20".
+	last = strings.SplitN(last, ",", 2)[0]
+	last = strings.ToLower(strings.TrimSpace(last))
+
+	return last
+}
+
+// parseNWSWindSpeedKmh parses NWS wind speed strings like:
+//   - "9 mph"
+//   - "10 to 15 mph"
+//
+// and converts to km/h.
+//
+// Policy: if a range is present, we use the midpoint (best effort).
+func parseNWSWindSpeedKmh(s string) *float64 {
+	raw := strings.ToLower(strings.TrimSpace(s))
+	if raw == "" {
+		return nil
+	}
+
+	nums := extractFloats(raw)
+	if len(nums) == 0 {
+		return nil
+	}
+
+	val := nums[0]
+	if len(nums) >= 2 && (strings.Contains(raw, " to ") || strings.Contains(raw, "-")) {
+		val = (nums[0] + nums[1]) / 2.0
+	}
+
+	switch {
+	case strings.Contains(raw, "mph"):
+		k := normcommon.SpeedKmhFromMph(val)
+		return &k
+
+	case strings.Contains(raw, "km/h") || strings.Contains(raw, "kph"):
+		k := val
+		return &k
+
+	case strings.Contains(raw, "kt") || strings.Contains(raw, "kts") || strings.Contains(raw, "knot"):
+		// 1 knot = 1.852 km/h
+		k := val * 1.852
+		return &k
+
+	default:
+		// Unknown unit; be conservative.
+		return nil
+	}
+}
+
+// parseNWSWindDirectionDegrees maps compass directions to degrees.
+// Returns nil if direction is empty/unknown.
+func parseNWSWindDirectionDegrees(dir string) *float64 {
+	d := strings.ToUpper(strings.TrimSpace(dir))
+	if d == "" {
+		return nil
+	}
+
+	// 16-wind compass.
+	m := map[string]float64{
+		"N":   0,
+		"NNE": 22.5,
+		"NE":  45,
+		"ENE": 67.5,
+		"E":   90,
+		"ESE": 112.5,
+		"SE":  135,
+		"SSE": 157.5,
+		"S":   180,
+		"SSW": 202.5,
+		"SW":  225,
+		"WSW": 247.5,
+		"W":   270,
+		"WNW": 292.5,
+		"NW":  315,
+		"NNW": 337.5,
+	}
+
+	if deg, ok := m[d]; ok {
+		return &deg
+	}
+	return nil
+}
+
+func extractFloats(s string) []float64 {
+	var out []float64
+	var buf strings.Builder
+
+	flush := func() {
+		if buf.Len() == 0 {
+			return
+		}
+		v, err := strconv.ParseFloat(buf.String(), 64)
+		if err == nil {
+			out = append(out, v)
+		}
+		buf.Reset()
+	}
+
+	for _, r := range s {
+		if unicode.IsDigit(r) || r == '.' {
+			buf.WriteRune(r)
+			continue
+		}
+		flush()
+	}
+	flush()
+
+	return out
+}

internal/normalizers/nws/observation.go

@@ -8,9 +8,10 @@ import (
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/event"
-	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
 	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 // ObservationNormalizer converts:
@@ -46,11 +47,11 @@ func buildObservation(parsed nwsObservationResponse) (model.WeatherObservation,
 	// Timestamp (RFC3339)
 	var ts time.Time
 	if s := strings.TrimSpace(parsed.Properties.Timestamp); s != "" {
-		t, err := time.Parse(time.RFC3339, s)
+		t, err := nwscommon.ParseTime(s)
 		if err != nil {
-			return model.WeatherObservation{}, time.Time{}, fmt.Errorf("nws observation normalize: invalid timestamp %q: %w", s, err)
+			return model.WeatherObservation{}, time.Time{}, fmt.Errorf("invalid timestamp %q: %w", s, err)
 		}
-		ts = t
+		ts = t.UTC()
 	}
 
 	cloudLayers := make([]model.CloudLayer, 0, len(parsed.Properties.CloudLayers))
@@ -75,9 +76,21 @@ func buildObservation(parsed nwsObservationResponse) (model.WeatherObservation,
 	// Determine canonical WMO condition code.
 	wmo := mapNWSToWMO(providerDesc, cloudLayers, phenomena)
 
+	var isDay *bool
+	if lat, lon := observationLatLon(parsed.Geometry.Coordinates); lat != nil && lon != nil {
+		isDay = isDayFromLatLonTime(*lat, *lon, ts)
+	}
+
 	// Canonical condition text comes from our WMO table.
-	// NWS observation responses typically do not include a day/night flag -> nil.
+	canonicalText := standards.WMOText(wmo, isDay)
-	canonicalText := standards.WMOText(wmo, nil)
+
+	// Apparent temperature: prefer wind chill when both are supplied.
+	var apparentC *float64
+	if parsed.Properties.WindChill.Value != nil {
+		apparentC = parsed.Properties.WindChill.Value
+	} else if parsed.Properties.HeatIndex.Value != nil {
+		apparentC = parsed.Properties.HeatIndex.Value
+	}
 
 	obs := model.WeatherObservation{
 		StationID:   parsed.Properties.StationID,
@@ -86,7 +99,7 @@ func buildObservation(parsed nwsObservationResponse) (model.WeatherObservation,
 
 		ConditionCode: wmo,
 		ConditionText: canonicalText,
-		IsDay:         nil,
+		IsDay:         isDay,
 
 		ProviderRawDescription: providerDesc,
 
@@ -107,8 +120,7 @@ func buildObservation(parsed nwsObservationResponse) (model.WeatherObservation,
 		VisibilityMeters:     parsed.Properties.Visibility.Value,
 
 		RelativeHumidityPercent: parsed.Properties.RelativeHumidity.Value,
-		WindChillC:              parsed.Properties.WindChill.Value,
+		ApparentTemperatureC:    apparentC,
-		HeatIndexC:              parsed.Properties.HeatIndex.Value,
 
 		ElevationMeters: parsed.Properties.Elevation.Value,
 		RawMessage:      parsed.Properties.RawMessage,

internal/normalizers/nws/register.go

@@ -13,4 +13,10 @@ func Register(reg *fknormalize.Registry) {
 
 	// Observations
 	reg.Register(ObservationNormalizer{})
+
+	// Forecasts
+	reg.Register(ForecastNormalizer{})
+
+	// Alerts
+	reg.Register(AlertsNormalizer{})
 }

internal/normalizers/nws/types.go

@@ -1,10 +1,18 @@
 // FILE: ./internal/normalizers/nws/types.go
 package nws
 
+import (
+	"encoding/json"
+)
+
 // nwsObservationResponse is a minimal-but-sufficient representation of the NWS
 // station observation GeoJSON payload needed for mapping into model.WeatherObservation.
 type nwsObservationResponse struct {
 	ID       string `json:"id"`
+	Geometry struct {
+		Type        string    `json:"type"`
+		Coordinates []float64 `json:"coordinates"` // GeoJSON point: [lon, lat]
+	} `json:"geometry"`
 	Properties struct {
 		StationID       string `json:"stationId"`
 		StationName     string `json:"stationName"`
@@ -87,3 +95,127 @@ type nwsObservationResponse struct {
 		} `json:"cloudLayers"`
 	} `json:"properties"`
 }
+
+// nwsForecastResponse is a minimal-but-sufficient representation of the NWS
+// gridpoint forecast GeoJSON payload needed for mapping into model.WeatherForecastRun.
+//
+// This is currently designed to support the hourly forecast endpoint; revisions may be needed
+// to accommodate other forecast endpoints in the future.
+type nwsForecastResponse struct {
+	Geometry struct {
+		Type        string        `json:"type"`
+		Coordinates [][][]float64 `json:"coordinates"` // GeoJSON polygon: [ring][point][lon,lat]
+	} `json:"geometry"`
+
+	Properties struct {
+		Units             string `json:"units"`             // "us" or "si" (often "us" for hourly)
+		ForecastGenerator string `json:"forecastGenerator"` // e.g. "HourlyForecastGenerator"
+
+		GeneratedAt string `json:"generatedAt"` // RFC3339-ish
+		UpdateTime  string `json:"updateTime"`  // RFC3339-ish
+		ValidTimes  string `json:"validTimes"`
+
+		Elevation struct {
+			UnitCode string   `json:"unitCode"`
+			Value    *float64 `json:"value"`
+		} `json:"elevation"`
+
+		Periods []nwsForecastPeriod `json:"periods"`
+	} `json:"properties"`
+}
+
+type nwsForecastPeriod struct {
+	Number    int    `json:"number"`
+	Name      string `json:"name"`
+	StartTime string `json:"startTime"`
+	EndTime   string `json:"endTime"`
+
+	IsDaytime *bool `json:"isDaytime"`
+
+	Temperature      *float64 `json:"temperature"`
+	TemperatureUnit  string   `json:"temperatureUnit"` // "F" or "C"
+	TemperatureTrend any      `json:"temperatureTrend"`
+
+	ProbabilityOfPrecipitation struct {
+		UnitCode string   `json:"unitCode"`
+		Value    *float64 `json:"value"`
+	} `json:"probabilityOfPrecipitation"`
+
+	Dewpoint struct {
+		UnitCode string   `json:"unitCode"`
+		Value    *float64 `json:"value"`
+	} `json:"dewpoint"`
+
+	RelativeHumidity struct {
+		UnitCode string   `json:"unitCode"`
+		Value    *float64 `json:"value"`
+	} `json:"relativeHumidity"`
+
+	WindSpeed     string `json:"windSpeed"`     // e.g. "9 mph", "10 to 15 mph"
+	WindDirection string `json:"windDirection"` // e.g. "W", "NW"
+
+	Icon             string `json:"icon"`
+	ShortForecast    string `json:"shortForecast"`
+	DetailedForecast string `json:"detailedForecast"`
+}
+
+// nwsAlertsResponse is a minimal-but-sufficient representation of the NWS /alerts
+// FeatureCollection payload needed for mapping into model.WeatherAlertRun.
+type nwsAlertsResponse struct {
+	Updated string `json:"updated"`
+	Title   string `json:"title"`
+
+	Features []nwsAlertFeature `json:"features"`
+}
+
+type nwsAlertFeature struct {
+	ID string `json:"id"`
+
+	Properties nwsAlertProperties `json:"properties"`
+}
+
+type nwsAlertProperties struct {
+	// Identifiers.
+	ID         string `json:"id"`         // often a URL/URI
+	Identifier string `json:"identifier"` // CAP identifier string (sometimes distinct)
+
+	// Classification / headline.
+	Event    string `json:"event"`
+	Headline string `json:"headline"`
+
+	Severity  string `json:"severity"`
+	Urgency   string `json:"urgency"`
+	Certainty string `json:"certainty"`
+
+	Status      string `json:"status"`
+	MessageType string `json:"messageType"`
+	Category    string `json:"category"`
+	Response    string `json:"response"`
+
+	// Narrative.
+	Description string `json:"description"`
+	Instruction string `json:"instruction"`
+
+	// Timing.
+	Sent      string `json:"sent"`
+	Effective string `json:"effective"`
+	Onset     string `json:"onset"`
+	Expires   string `json:"expires"`
+	Ends      string `json:"ends"`
+
+	// Area / provenance.
+	AreaDesc   string `json:"areaDesc"`
+	Sender     string `json:"sender"`
+	SenderName string `json:"senderName"`
+
+	// Related alerts (updates/replacements).
+	// Keep flexible: some NWS payloads use an object array; others may degrade to strings.
+	References json.RawMessage `json:"references"`
+}
+
+type nwsAlertReference struct {
+	ID         string `json:"id"`
+	Identifier string `json:"identifier"`
+	Sender     string `json:"sender"`
+	Sent       string `json:"sent"`
+}

internal/normalizers/nws/wmo_map.go

@@ -4,8 +4,8 @@ package nws
 import (
 	"strings"
 
-	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
 	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 // mapNWSToWMO maps NWS signals into a canonical WMO code.

internal/normalizers/openmeteo/common.go

@@ -1,19 +0,0 @@
-// FILE: ./internal/normalizers/openmeteo/common.go
-package openmeteo
-
-import (
-	"time"
-
-	openmeteo "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/openmeteo"
-)
-
-// parseOpenMeteoTime parses Open-Meteo timestamps.
-//
-// The actual parsing logic lives in internal/providers/openmeteo so both the
-// source (envelope EffectiveAt / event ID) and normalizer (canonical payload)
-// can share identical timestamp behavior.
-//
-// We keep this thin wrapper to avoid churn in the normalizer package.
-func parseOpenMeteoTime(s string, tz string, utcOffsetSeconds int) (time.Time, error) {
-	return openmeteo.ParseTime(s, tz, utcOffsetSeconds)
-}

internal/normalizers/openmeteo/forecast.go

@@ -0,0 +1,246 @@
+package openmeteo
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"gitea.maximumdirect.net/ejr/feedkit/event"
+	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	omcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/openmeteo"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
+)
+
+// ForecastNormalizer converts:
+//
+//	standards.SchemaRawOpenMeteoHourlyForecastV1 -> standards.SchemaWeatherForecastV1
+//
+// It interprets Open-Meteo hourly forecast JSON and maps it into the canonical
+// model.WeatherForecastRun representation.
+//
+// Caveats / assumptions:
+//   - Open-Meteo does not provide a true "issued at" timestamp; IssuedAt uses
+//     Event.EmittedAt when present, otherwise the first hourly time.
+//   - Hourly payloads are array-oriented; missing fields are treated as nil per-period.
+//   - Snowfall is provided in centimeters and is converted to millimeters.
+//   - apparent_temperature is mapped to ApparentTemperatureC when present.
+type ForecastNormalizer struct{}
+
+func (ForecastNormalizer) Match(e event.Event) bool {
+	return strings.TrimSpace(e.Schema) == standards.SchemaRawOpenMeteoHourlyForecastV1
+}
+
+func (ForecastNormalizer) Normalize(ctx context.Context, in event.Event) (*event.Event, error) {
+	_ = ctx // normalization is pure/CPU; keep ctx for future expensive steps
+
+	// If present, prefer the existing event EmittedAt as IssuedAt.
+	var fallbackIssued time.Time
+	if !in.EmittedAt.IsZero() {
+		fallbackIssued = in.EmittedAt.UTC()
+	}
+
+	return normcommon.NormalizeJSON(
+		in,
+		"openmeteo hourly forecast",
+		standards.SchemaWeatherForecastV1,
+		func(parsed omForecastResponse) (model.WeatherForecastRun, time.Time, error) {
+			return buildForecast(parsed, fallbackIssued)
+		},
+	)
+}
+
+// buildForecast contains the domain mapping logic (provider -> canonical model).
+func buildForecast(parsed omForecastResponse, fallbackIssued time.Time) (model.WeatherForecastRun, time.Time, error) {
+	times := parsed.Hourly.Time
+	if len(times) == 0 {
+		return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("missing hourly.time")
+	}
+	issuedAt := fallbackIssued.UTC()
+
+	run := model.WeatherForecastRun{
+		LocationID:   normcommon.SynthStationIDPtr("OPENMETEO", parsed.Latitude, parsed.Longitude),
+		LocationName: "Open-Meteo",
+
+		IssuedAt:  time.Time{},
+		UpdatedAt: nil,
+		Product:   model.ForecastProductHourly,
+
+		Latitude:        floatCopy(parsed.Latitude),
+		Longitude:       floatCopy(parsed.Longitude),
+		ElevationMeters: floatCopy(parsed.Elevation),
+
+		Periods: nil,
+	}
+
+	periods := make([]model.WeatherForecastPeriod, 0, len(times))
+	var prevStart time.Time
+	for i := range times {
+		start, err := parseHourlyTime(parsed, i)
+		if err != nil {
+			return model.WeatherForecastRun{}, time.Time{}, err
+		}
+		if issuedAt.IsZero() && i == 0 {
+			issuedAt = start
+		}
+
+		end, err := parsePeriodEnd(parsed, i, start, prevStart)
+		if err != nil {
+			return model.WeatherForecastRun{}, time.Time{}, err
+		}
+		prevStart = start
+
+		var isDay *bool
+		if v := intAt(parsed.Hourly.IsDay, i); v != nil {
+			b := *v == 1
+			isDay = &b
+		}
+
+		wmo := wmoAt(parsed.Hourly.WeatherCode, i)
+		canonicalText := standards.WMOText(wmo, isDay)
+
+		period := model.WeatherForecastPeriod{
+			StartTime: start,
+			EndTime:   end,
+
+			Name:  "",
+			IsDay: isDay,
+
+			ConditionCode: wmo,
+			ConditionText: canonicalText,
+
+			ProviderRawDescription: "",
+
+			TextDescription: canonicalText,
+			DetailedText:    "",
+
+			IconURL: "",
+		}
+
+		if v := floatAt(parsed.Hourly.Temperature2m, i); v != nil {
+			period.TemperatureC = v
+		}
+		if v := floatAt(parsed.Hourly.ApparentTemp, i); v != nil {
+			period.ApparentTemperatureC = v
+		}
+		if v := floatAt(parsed.Hourly.DewPoint2m, i); v != nil {
+			period.DewpointC = v
+		}
+		if v := floatAt(parsed.Hourly.RelativeHumidity2m, i); v != nil {
+			period.RelativeHumidityPercent = v
+		}
+		if v := floatAt(parsed.Hourly.WindDirection10m, i); v != nil {
+			period.WindDirectionDegrees = v
+		}
+		if v := floatAt(parsed.Hourly.WindSpeed10m, i); v != nil {
+			period.WindSpeedKmh = v
+		}
+		if v := floatAt(parsed.Hourly.WindGusts10m, i); v != nil {
+			period.WindGustKmh = v
+		}
+		if v := floatAt(parsed.Hourly.Visibility, i); v != nil {
+			period.VisibilityMeters = v
+		}
+		if v := floatAt(parsed.Hourly.CloudCover, i); v != nil {
+			period.CloudCoverPercent = v
+		}
+		if v := floatAt(parsed.Hourly.UVIndex, i); v != nil {
+			period.UVIndex = v
+		}
+
+		if v := floatAt(parsed.Hourly.PrecipProbability, i); v != nil {
+			period.ProbabilityOfPrecipitationPercent = v
+		}
+		if v := floatAt(parsed.Hourly.Precipitation, i); v != nil {
+			period.PrecipitationAmountMm = v
+		}
+		if v := floatAt(parsed.Hourly.Snowfall, i); v != nil {
+			mm := *v * 10.0
+			period.SnowfallDepthMM = &mm
+		}
+
+		if v := floatAt(parsed.Hourly.SurfacePressure, i); v != nil {
+			pa := normcommon.PressurePaFromHPa(*v)
+			period.BarometricPressurePa = &pa
+		} else if v := floatAt(parsed.Hourly.PressureMSL, i); v != nil {
+			pa := normcommon.PressurePaFromHPa(*v)
+			period.BarometricPressurePa = &pa
+		}
+
+		periods = append(periods, period)
+	}
+
+	run.Periods = periods
+
+	if issuedAt.IsZero() {
+		return model.WeatherForecastRun{}, time.Time{}, fmt.Errorf("missing issuedAt")
+	}
+	run.IssuedAt = issuedAt
+
+	// EffectiveAt policy for forecasts: treat IssuedAt as the effective time (dedupe-friendly).
+	return run, issuedAt, nil
+}
+
+func parseHourlyTime(parsed omForecastResponse, idx int) (time.Time, error) {
+	if idx < 0 || idx >= len(parsed.Hourly.Time) {
+		return time.Time{}, fmt.Errorf("hourly.time[%d] missing", idx)
+	}
+	raw := strings.TrimSpace(parsed.Hourly.Time[idx])
+	if raw == "" {
+		return time.Time{}, fmt.Errorf("hourly.time[%d] empty", idx)
+	}
+
+	t, err := omcommon.ParseTime(raw, parsed.Timezone, parsed.UTCOffsetSeconds)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("hourly.time[%d] invalid %q: %w", idx, raw, err)
+	}
+	return t.UTC(), nil
+}
+
+func parsePeriodEnd(parsed omForecastResponse, idx int, start, prevStart time.Time) (time.Time, error) {
+	if idx+1 < len(parsed.Hourly.Time) {
+		return parseHourlyTime(parsed, idx+1)
+	}
+
+	step := time.Hour
+	if !prevStart.IsZero() {
+		if d := start.Sub(prevStart); d > 0 {
+			step = d
+		}
+	}
+	return start.Add(step), nil
+}
+
+func floatCopy(v *float64) *float64 {
+	if v == nil {
+		return nil
+	}
+	out := *v
+	return &out
+}
+
+func floatAt(vals []*float64, idx int) *float64 {
+	if idx < 0 || idx >= len(vals) {
+		return nil
+	}
+	return floatCopy(vals[idx])
+}
+
+func intAt(vals []*int, idx int) *int {
+	if idx < 0 || idx >= len(vals) {
+		return nil
+	}
+	if vals[idx] == nil {
+		return nil
+	}
+	out := *vals[idx]
+	return &out
+}
+
+func wmoAt(vals []*int, idx int) model.WMOCode {
+	if v := intAt(vals, idx); v != nil {
+		return model.WMOCode(*v)
+	}
+	return model.WMOUnknown
+}

internal/normalizers/openmeteo/observation.go

@@ -8,9 +8,10 @@ import (
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/event"
-	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
 	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
+	omcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/openmeteo"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 // ObservationNormalizer converts:
@@ -54,9 +55,9 @@ func buildObservation(parsed omResponse) (model.WeatherObservation, time.Time, e
 	// Parse current.time.
 	var ts time.Time
 	if s := strings.TrimSpace(parsed.Current.Time); s != "" {
-		t, err := parseOpenMeteoTime(s, parsed.Timezone, parsed.UTCOffsetSeconds)
+		t, err := omcommon.ParseTime(s, parsed.Timezone, parsed.UTCOffsetSeconds)
 		if err != nil {
-			return model.WeatherObservation{}, time.Time{}, fmt.Errorf("openmeteo observation normalize: parse time %q: %w", s, err)
+			return model.WeatherObservation{}, time.Time{}, fmt.Errorf("parse time %q: %w", s, err)
 		}
 		ts = t.UTC()
 	}
@@ -77,18 +78,8 @@ func buildObservation(parsed omResponse) (model.WeatherObservation, time.Time, e
 	canonicalText := standards.WMOText(wmo, isDay)
 
 	// Station identity: Open-Meteo is not a station feed; synthesize from coordinates.
-	stationID := ""
+	// Require BOTH lat/lon to avoid misleading OPENMETEO(0.00000,...) IDs.
-	if parsed.Latitude != nil || parsed.Longitude != nil {
+	stationID := normcommon.SynthStationIDPtr("OPENMETEO", parsed.Latitude, parsed.Longitude)
-		lat := 0.0
-		lon := 0.0
-		if parsed.Latitude != nil {
-			lat = *parsed.Latitude
-		}
-		if parsed.Longitude != nil {
-			lon = *parsed.Longitude
-		}
-		stationID = fmt.Sprintf("OPENMETEO(%.5f,%.5f)", lat, lon)
-	}
 
 	obs := model.WeatherObservation{
 		StationID:   stationID,
@@ -116,6 +107,10 @@ func buildObservation(parsed omResponse) (model.WeatherObservation, time.Time, e
 		v := *parsed.Current.Temperature2m
 		obs.TemperatureC = &v
 	}
+	if parsed.Current.ApparentTemperature != nil {
+		v := *parsed.Current.ApparentTemperature
+		obs.ApparentTemperatureC = &v
+	}
 
 	if parsed.Current.RelativeHumidity2m != nil {
 		v := *parsed.Current.RelativeHumidity2m

internal/normalizers/openmeteo/register.go

@@ -13,4 +13,6 @@ func Register(reg *fknormalize.Registry) {
 
 	// Observations
 	reg.Register(ObservationNormalizer{})
+	// Forecasts
+	reg.Register(ForecastNormalizer{})
 }

internal/normalizers/openmeteo/types.go

@@ -19,6 +19,7 @@ type omCurrent struct {
 	Time string `json:"time"` // e.g. "2026-01-10T12:30" (often no timezone suffix)
 
 	Temperature2m       *float64 `json:"temperature_2m"`
+	ApparentTemperature *float64 `json:"apparent_temperature"`
 	RelativeHumidity2m  *float64 `json:"relative_humidity_2m"`
 	WeatherCode         *int     `json:"weather_code"`
 
@@ -31,3 +32,38 @@ type omCurrent struct {
 
 	IsDay *int `json:"is_day"` // 0/1
 }
+
+// omForecastResponse is a minimal-but-sufficient representation of Open-Meteo
+// hourly forecast payloads for mapping into model.WeatherForecastRun.
+type omForecastResponse struct {
+	Latitude         *float64 `json:"latitude"`
+	Longitude        *float64 `json:"longitude"`
+	Timezone         string   `json:"timezone"`
+	UTCOffsetSeconds int      `json:"utc_offset_seconds"`
+	Elevation        *float64 `json:"elevation"`
+
+	Hourly omForecastHourly `json:"hourly"`
+}
+
+type omForecastHourly struct {
+	Time []string `json:"time"`
+
+	Temperature2m      []*float64 `json:"temperature_2m"`
+	RelativeHumidity2m []*float64 `json:"relative_humidity_2m"`
+	DewPoint2m         []*float64 `json:"dew_point_2m"`
+	ApparentTemp       []*float64 `json:"apparent_temperature"`
+	PrecipProbability  []*float64 `json:"precipitation_probability"`
+	Precipitation      []*float64 `json:"precipitation"`
+	Snowfall           []*float64 `json:"snowfall"`
+	WeatherCode        []*int     `json:"weather_code"`
+	SurfacePressure    []*float64 `json:"surface_pressure"`
+	PressureMSL        []*float64 `json:"pressure_msl"`
+	WindSpeed10m       []*float64 `json:"wind_speed_10m"`
+	WindDirection10m   []*float64 `json:"wind_direction_10m"`
+	WindGusts10m       []*float64 `json:"wind_gusts_10m"`
+	IsDay              []*int     `json:"is_day"`
+
+	CloudCover []*float64 `json:"cloud_cover"`
+	Visibility []*float64 `json:"visibility"`
+	UVIndex    []*float64 `json:"uv_index"`
+}

internal/normalizers/openweather/common.go

@@ -4,6 +4,8 @@ package openweather
 import (
 	"fmt"
 	"strings"
+
+	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
 )
 
 // This file holds provider-specific helpers that are shared across multiple
@@ -67,5 +69,5 @@ func openWeatherStationID(parsed owmResponse) string {
 		return fmt.Sprintf("OPENWEATHER(%d)", parsed.ID)
 	}
 	// Fallback: synthesize from coordinates.
-	return fmt.Sprintf("OPENWEATHER(%.5f,%.5f)", parsed.Coord.Lat, parsed.Coord.Lon)
+	return normcommon.SynthStationID("OPENWEATHER", parsed.Coord.Lat, parsed.Coord.Lon)
 }

internal/normalizers/openweather/observation.go

@@ -7,9 +7,9 @@ import (
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/event"
-	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
 	normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 // ObservationNormalizer converts:
@@ -68,6 +68,11 @@ func buildObservation(parsed owmResponse) (model.WeatherObservation, time.Time,
 	//  - wind speed is m/s -> km/h conversion
 	tempC := parsed.Main.Temp
 	rh := parsed.Main.Humidity
+	var apparentC *float64
+	if parsed.Main.FeelsLike != nil {
+		v := *parsed.Main.FeelsLike
+		apparentC = &v
+	}
 
 	surfacePa := normcommon.PressurePaFromHPa(parsed.Main.Pressure)
 	var seaLevelPa *float64
@@ -117,6 +122,7 @@ func buildObservation(parsed owmResponse) (model.WeatherObservation, time.Time,
 		IconURL:         iconURL,
 
 		TemperatureC:         &tempC,
+		ApparentTemperatureC: apparentC,
 
 		WindDirectionDegrees: parsed.Wind.Deg,
 		WindSpeedKmh:         &wsKmh,

internal/normalizers/openweather/types.go

@@ -16,6 +16,7 @@ type owmResponse struct {
 
 	Main struct {
 		Temp      float64  `json:"temp"`       // °C when units=metric (enforced by source)
+		FeelsLike *float64 `json:"feels_like"` // °C when units=metric (enforced by source)
 		Pressure  float64  `json:"pressure"`   // hPa
 		Humidity  float64  `json:"humidity"`   // %
 		SeaLevel  *float64 `json:"sea_level"`

internal/normalizers/openweather/wmo_map.go

@@ -1,7 +1,7 @@
 // FILE: ./internal/normalizers/openweather/wmo_map.go
 package openweather
 
-import "gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
+import "gitea.maximumdirect.net/ejr/weatherfeeder/model"
 
 // mapOpenWeatherToWMO maps OpenWeather weather condition IDs into weatherfeeder's
 // canonical WMO code vocabulary.

internal/providers/nws/doc.go

@@ -0,0 +1,8 @@
+// Package nws contains provider-specific helper code for the National Weather Service
+// used by both sources and normalizers.
+//
+// Rules:
+//   - No network I/O here (sources fetch; normalizers transform).
+//   - Keep helpers deterministic and easy to unit test.
+//   - Prefer putting provider quirks/parsing here when sources + normalizers both need it.
+package nws

internal/providers/nws/time.go

@@ -0,0 +1,50 @@
+package nws
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// ParseTime parses NWS timestamps.
+//
+// NWS observation timestamps are typically RFC3339, sometimes with fractional seconds.
+// We accept RFC3339Nano first, then RFC3339.
+func ParseTime(s string) (time.Time, error) {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return time.Time{}, fmt.Errorf("empty time")
+	}
+
+	if t, err := time.Parse(time.RFC3339Nano, s); err == nil {
+		return t, nil
+	}
+	if t, err := time.Parse(time.RFC3339, s); err == nil {
+		return t, nil
+	}
+
+	return time.Time{}, fmt.Errorf("unsupported NWS timestamp format: %q", s)
+}
+
+// ParseTimeBestEffort parses an NWS timestamp and returns it in UTC.
+//
+// This is a convenience for normalizers that want "best effort" parsing:
+// invalid/empty strings do not fail the entire normalization; they return zero time.
+func ParseTimeBestEffort(s string) time.Time {
+	t, err := ParseTime(s)
+	if err != nil {
+		return time.Time{}
+	}
+	return t.UTC()
+}
+
+// ParseTimePtr parses an NWS timestamp and returns a UTC *time.Time.
+//
+// Empty/unparseable input returns nil. This is useful for optional CAP fields.
+func ParseTimePtr(s string) *time.Time {
+	t := ParseTimeBestEffort(s)
+	if t.IsZero() {
+		return nil
+	}
+	return &t
+}

internal/providers/openweather/doc.go

@@ -0,0 +1,8 @@
+// Package openweather contains provider-specific helper code for OpenWeather used by
+// both sources and normalizers.
+//
+// Rules:
+//   - No network I/O here.
+//   - Keep helpers deterministic and easy to unit test.
+//   - Put provider invariants here (e.g., units=metric enforcement).
+package openweather

internal/providers/openweather/url.go

@@ -0,0 +1,26 @@
+package openweather
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+// RequireMetricUnits enforces weatherfeeder's OpenWeather invariant:
+// the request URL must include units=metric (otherwise temperatures/winds/pressure differ).
+func RequireMetricUnits(rawURL string) error {
+	u, err := url.Parse(strings.TrimSpace(rawURL))
+	if err != nil {
+		return fmt.Errorf("invalid url %q: %w", rawURL, err)
+	}
+
+	units := strings.ToLower(strings.TrimSpace(u.Query().Get("units")))
+	if units != "metric" {
+		if units == "" {
+			units = "(missing; defaults to standard)"
+		}
+		return fmt.Errorf("url must include units=metric (got units=%s)", units)
+	}
+
+	return nil
+}

internal/sources/builtins.go

@@ -1,8 +1,6 @@
 package sources
 
 import (
-	"fmt"
-
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/nws"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/openmeteo"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/openweather"
@@ -29,28 +27,12 @@ func RegisterBuiltins(r *fksource.Registry) {
 	r.Register("openmeteo_observation", func(cfg config.SourceConfig) (fksource.Source, error) {
 		return openmeteo.NewObservationSource(cfg)
 	})
+	r.Register("openmeteo_forecast", func(cfg config.SourceConfig) (fksource.Source, error) {
+		return openmeteo.NewForecastSource(cfg)
+	})
 
 	// OpenWeatherMap drivers
 	r.Register("openweather_observation", func(cfg config.SourceConfig) (fksource.Source, error) {
 		return openweather.NewObservationSource(cfg)
 	})
 }
-
-// Optional: centralize some common config checks used by multiple drivers.
-//
-// NOTE: feedkit/config.SourceConfig intentionally keeps driver-specific options
-// inside cfg.Params, so drivers can evolve independently without feedkit
-// importing domain config packages.
-func RequireURL(cfg config.SourceConfig) error {
-	if cfg.Params == nil {
-		return fmt.Errorf("source %q: params.url is required", cfg.Name)
-	}
-
-	// Canonical key is "url". We also accept "URL" as a convenience.
-	url, ok := cfg.ParamString("url", "URL")
-	if !ok {
-		return fmt.Errorf("source %q: params.url is required", cfg.Name)
-	}
-	_ = url // (optional) return it if you want this helper to provide the value
-	return nil
-}

internal/sources/common/event.go

@@ -9,17 +9,34 @@ import (
 
 // SingleRawEvent constructs, validates, and returns a slice containing exactly one event.
 //
-// This removes the repetitive "event envelope ceremony" from individual sources.
+// This removes repetitive "event envelope ceremony" from individual sources.
 // Sources remain responsible for:
 //   - fetching bytes (raw payload)
 //   - choosing Schema (raw schema identifier)
-//   - computing a stable Event.ID and (optional) EffectiveAt
+//   - computing Event.ID and (optional) EffectiveAt
-func SingleRawEvent(kind event.Kind, sourceName string, schema string, id string, effectiveAt *time.Time, payload any) ([]event.Event, error) {
+//
+// emittedAt is explicit so callers can compute IDs using the same timestamp (or
+// so tests can provide a stable value).
+func SingleRawEvent(
+	kind event.Kind,
+	sourceName string,
+	schema string,
+	id string,
+	emittedAt time.Time,
+	effectiveAt *time.Time,
+	payload any,
+) ([]event.Event, error) {
+	if emittedAt.IsZero() {
+		emittedAt = time.Now().UTC()
+	} else {
+		emittedAt = emittedAt.UTC()
+	}
+
 	e := event.Event{
 		ID:          id,
 		Kind:        kind,
 		Source:      sourceName,
-		EmittedAt:   time.Now().UTC(),
+		EmittedAt:   emittedAt,
 		EffectiveAt: effectiveAt,
 
 		// RAW schema (normalizer matches on this).

internal/sources/common/http.go

@@ -1,70 +1,76 @@
-// FILE: ./internal/sources/common/http.go
+// FILE: ./internal/sources/common/http_source.go
 package common
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
-	"io"
 	"net/http"
-	"time"
+
+	"gitea.maximumdirect.net/ejr/feedkit/config"
+	"gitea.maximumdirect.net/ejr/feedkit/transport"
 )
 
-// maxResponseBodyBytes is a hard safety limit on HTTP response bodies.
+// HTTPSource is a tiny, reusable "HTTP polling spine" for weatherfeeder sources.
-// API responses should be small, so this protects us from accidental
+//
-// or malicious large responses.
+// It centralizes the boring parts:
-const maxResponseBodyBytes = 2 << 21 // 4 MiB
+//   - standard config shape (url + user_agent) via RequireHTTPSourceConfig
-
+//   - a default http.Client with timeout
-// DefaultHTTPTimeout is the standard timeout used by weatherfeeder HTTP sources.
+//   - FetchBody / headers / max-body safety limit
-// Individual drivers may override this if they have a specific need.
+//   - consistent error wrapping (driver + source name)
-const DefaultHTTPTimeout = 10 * time.Second
+//
-
+// Individual drivers remain responsible for:
-// NewHTTPClient returns a simple http.Client configured with a timeout.
+//   - decoding minimal metadata (for Event.ID / EffectiveAt)
-// If timeout <= 0, DefaultHTTPTimeout is used.
+//   - constructing the event envelope (kind/schema/payload)
-func NewHTTPClient(timeout time.Duration) *http.Client {
+type HTTPSource struct {
-	if timeout <= 0 {
+	Driver    string
-		timeout = DefaultHTTPTimeout
+	Name      string
-	}
+	URL       string
-	return &http.Client{Timeout: timeout}
+	UserAgent string
+	Accept    string
+	Client    *http.Client
 }
 
-func FetchBody(ctx context.Context, client *http.Client, url, userAgent, accept string) ([]byte, error) {
+// NewHTTPSource builds an HTTPSource using weatherfeeder's standard HTTP source
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+// config (params.url + params.user_agent) and a default HTTP client.
+func NewHTTPSource(driver string, cfg config.SourceConfig, accept string) (*HTTPSource, error) {
+	c, err := RequireHTTPSourceConfig(driver, cfg)
 	if err != nil {
 		return nil, err
 	}
 
-	if userAgent != "" {
+	return &HTTPSource{
-		req.Header.Set("User-Agent", userAgent)
+		Driver:    driver,
-	}
+		Name:      c.Name,
-	if accept != "" {
+		URL:       c.URL,
-		req.Header.Set("Accept", accept)
+		UserAgent: c.UserAgent,
+		Accept:    accept,
+		Client:    transport.NewHTTPClient(transport.DefaultHTTPTimeout),
+	}, nil
 }
 
-	res, err := client.Do(req)
+// FetchBytes fetches the URL and returns the raw response body bytes.
+func (s *HTTPSource) FetchBytes(ctx context.Context) ([]byte, error) {
+	client := s.Client
+	if client == nil {
+		// Defensive: allow tests or callers to nil out Client; keep behavior sane.
+		client = transport.NewHTTPClient(transport.DefaultHTTPTimeout)
+	}
+
+	b, err := transport.FetchBody(ctx, client, s.URL, s.UserAgent, s.Accept)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("%s %q: %w", s.Driver, s.Name, err)
 	}
-	defer res.Body.Close()
-
-	if res.StatusCode < 200 || res.StatusCode >= 300 {
-		return nil, fmt.Errorf("HTTP %s", res.Status)
-	}
-
-	// Read at most maxResponseBodyBytes + 1 so we can detect overflow.
-	limited := io.LimitReader(res.Body, maxResponseBodyBytes+1)
-
-	b, err := io.ReadAll(limited)
-	if err != nil {
-		return nil, err
-	}
-
-	if len(b) == 0 {
-		return nil, fmt.Errorf("empty response body")
-	}
-
-	if len(b) > maxResponseBodyBytes {
-		return nil, fmt.Errorf("response body too large (>%d bytes)", maxResponseBodyBytes)
-	}
-
 	return b, nil
 }
+
+// FetchJSON fetches the URL and returns the raw body as json.RawMessage.
+// json.Unmarshal accepts json.RawMessage directly, so callers can decode minimal
+// metadata without keeping both []byte and RawMessage in their own structs.
+func (s *HTTPSource) FetchJSON(ctx context.Context) (json.RawMessage, error) {
+	b, err := s.FetchBytes(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return json.RawMessage(b), nil
+}

internal/sources/common/id.go

@@ -0,0 +1,39 @@
+// FILE: ./internal/sources/common/id.go
+package common
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// ChooseEventID applies weatherfeeder's opinionated Event.ID policy:
+//
+//   - If upstream provides an ID, use it (trimmed).
+//   - Otherwise, ID is "<Source>:<EffectiveAt>" when available.
+//   - If EffectiveAt is unavailable, fall back to "<Source>:<EmittedAt>".
+//
+// Timestamps are encoded as RFC3339Nano in UTC.
+func ChooseEventID(upstreamID, sourceName string, effectiveAt *time.Time, emittedAt time.Time) string {
+	if id := strings.TrimSpace(upstreamID); id != "" {
+		return id
+	}
+
+	src := strings.TrimSpace(sourceName)
+	if src == "" {
+		src = "UNKNOWN_SOURCE"
+	}
+
+	// Prefer EffectiveAt for dedupe friendliness.
+	if effectiveAt != nil && !effectiveAt.IsZero() {
+		return fmt.Sprintf("%s:%s", src, effectiveAt.UTC().Format(time.RFC3339Nano))
+	}
+
+	// Fall back to EmittedAt (still stable within a poll invocation).
+	t := emittedAt.UTC()
+	if t.IsZero() {
+		t = time.Now().UTC()
+	}
+
+	return fmt.Sprintf("%s:%s", src, t.Format(time.RFC3339Nano))
+}

internal/sources/nws/alerts.go

@@ -1,54 +1,147 @@
+// FILE: internal/sources/nws/alerts.go
 package nws
 
 import (
 	"context"
-	"fmt"
+	"encoding/json"
 	"strings"
+	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/config"
 	"gitea.maximumdirect.net/ejr/feedkit/event"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/common"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
 )
 
+// AlertsSource polls an NWS alerts endpoint and emits a RAW alerts Event.
+//
+// It intentionally emits the *entire* upstream payload as json.RawMessage and only decodes
+// minimal metadata for Event.EffectiveAt and Event.ID.
+//
+// Output schema:
+//   - standards.SchemaRawNWSAlertsV1
 type AlertsSource struct {
-	name      string
+	http *common.HTTPSource
-	url       string
-	userAgent string
 }
 
 func NewAlertsSource(cfg config.SourceConfig) (*AlertsSource, error) {
-	if strings.TrimSpace(cfg.Name) == "" {
+	const driver = "nws_alerts"
-		return nil, fmt.Errorf("nws_alerts: name is required")
+
-	}
+	// NWS alerts responses are GeoJSON-ish; allow fallback to plain JSON as well.
-	if cfg.Params == nil {
+	hs, err := common.NewHTTPSource(driver, cfg, "application/geo+json, application/json")
-		return nil, fmt.Errorf("nws_alerts %q: params are required (need params.url and params.user_agent)", cfg.Name)
+	if err != nil {
+		return nil, err
 	}
 
-	// Driver-specific options live in cfg.Params to keep feedkit domain-agnostic.
+	return &AlertsSource{http: hs}, nil
-	// Use the typed accessor so callers can’t accidentally pass non-strings to TrimSpace.
-	url, ok := cfg.ParamString("url", "URL")
-	if !ok {
-		return nil, fmt.Errorf("nws_alerts %q: params.url is required", cfg.Name)
 }
 
-	ua, ok := cfg.ParamString("user_agent", "userAgent")
+func (s *AlertsSource) Name() string { return s.http.Name }
-	if !ok {
-		return nil, fmt.Errorf("nws_alerts %q: params.user_agent is required", cfg.Name)
-	}
-
-	return &AlertsSource{
-		name:      cfg.Name,
-		url:       url,
-		userAgent: ua,
-	}, nil
-}
-
-func (s *AlertsSource) Name() string { return s.name }
 
 // Kind is used for routing/policy.
-// The envelope type is event.Event; payload will eventually be something like model.WeatherAlert.
 func (s *AlertsSource) Kind() event.Kind { return event.Kind("alert") }
 
 func (s *AlertsSource) Poll(ctx context.Context) ([]event.Event, error) {
-	_ = ctx
+	raw, meta, err := s.fetchRaw(ctx)
-	return nil, fmt.Errorf("nws.AlertsSource.Poll: TODO implement (url=%s)", s.url)
+	if err != nil {
+		return nil, err
+	}
+
+	// EffectiveAt policy for alerts:
+	// Prefer the collection-level "updated" timestamp (best dedupe signal).
+	// If missing, fall back to the most recent per-alert timestamp we can parse.
+	var effectiveAt *time.Time
+	switch {
+	case !meta.ParsedUpdated.IsZero():
+		t := meta.ParsedUpdated.UTC()
+		effectiveAt = &t
+	case !meta.ParsedLatestFeatureTime.IsZero():
+		t := meta.ParsedLatestFeatureTime.UTC()
+		effectiveAt = &t
+	}
+
+	emittedAt := time.Now().UTC()
+
+	// NWS alerts collections do not provide a stable per-snapshot ID.
+	// Use Source:EffectiveAt (or Source:EmittedAt fallback) for dedupe friendliness.
+	eventID := common.ChooseEventID("", s.http.Name, effectiveAt, emittedAt)
+
+	return common.SingleRawEvent(
+		s.Kind(),
+		s.http.Name,
+		standards.SchemaRawNWSAlertsV1,
+		eventID,
+		emittedAt,
+		effectiveAt,
+		raw,
+	)
+}
+
+// ---- RAW fetch + minimal metadata decode ----
+
+// alertsMeta is a minimal view of the NWS /alerts FeatureCollection.
+// We only decode fields used to set EffectiveAt deterministically.
+type alertsMeta struct {
+	Updated  string `json:"updated"`
+	Features []struct {
+		Properties struct {
+			Sent      string `json:"sent"`
+			Effective string `json:"effective"`
+			Expires   string `json:"expires"`
+			Ends      string `json:"ends"`
+		} `json:"properties"`
+	} `json:"features"`
+
+	ParsedUpdated           time.Time `json:"-"`
+	ParsedLatestFeatureTime time.Time `json:"-"`
+}
+
+func (s *AlertsSource) fetchRaw(ctx context.Context) (json.RawMessage, alertsMeta, error) {
+	raw, err := s.http.FetchJSON(ctx)
+	if err != nil {
+		return nil, alertsMeta{}, err
+	}
+
+	var meta alertsMeta
+	if err := json.Unmarshal(raw, &meta); err != nil {
+		// If metadata decode fails, still return raw; Poll will fall back to Source:EmittedAt.
+		return raw, alertsMeta{}, nil
+	}
+
+	// Top-level updated (preferred).
+	if us := strings.TrimSpace(meta.Updated); us != "" {
+		if t, err := nwscommon.ParseTime(us); err == nil {
+			meta.ParsedUpdated = t.UTC()
+		}
+	}
+
+	// If Updated is missing/unparseable, compute a best-effort "latest" feature timestamp.
+	// We prefer Sent/Effective, and fall back to Expires/Ends if needed.
+	var latest time.Time
+	for _, f := range meta.Features {
+		candidates := []string{
+			f.Properties.Sent,
+			f.Properties.Effective,
+			f.Properties.Expires,
+			f.Properties.Ends,
+		}
+		for _, s := range candidates {
+			ts := strings.TrimSpace(s)
+			if ts == "" {
+				continue
+			}
+			t, err := nwscommon.ParseTime(ts)
+			if err != nil {
+				continue
+			}
+			t = t.UTC()
+			if latest.IsZero() || t.After(latest) {
+				latest = t
+			}
+		}
+	}
+	meta.ParsedLatestFeatureTime = latest
+
+	return raw, meta, nil
 }

internal/sources/nws/forecast.go

@@ -1,51 +1,129 @@
+// FILE: internal/sources/nws/forecast.go
 package nws
 
 import (
 	"context"
-	"fmt"
+	"encoding/json"
 	"strings"
+	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/config"
 	"gitea.maximumdirect.net/ejr/feedkit/event"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/common"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
 )
 
+// ForecastSource polls an NWS forecast endpoint (narrative or hourly) and emits a RAW forecast Event.
+//
+// It intentionally emits the *entire* upstream payload as json.RawMessage and only decodes
+// minimal metadata for Event.EffectiveAt and Event.ID.
+//
+// Output schema (current implementation):
+//   - standards.SchemaRawNWSHourlyForecastV1
 type ForecastSource struct {
-	name      string
+	http *common.HTTPSource
-	url       string
-	userAgent string
 }
 
 func NewForecastSource(cfg config.SourceConfig) (*ForecastSource, error) {
-	if strings.TrimSpace(cfg.Name) == "" {
+	const driver = "nws_forecast"
-		return nil, fmt.Errorf("nws_forecast: name is required")
+
-	}
+	// NWS forecast endpoints are GeoJSON (and sometimes also advertise json-ld/json).
-	if cfg.Params == nil {
+	hs, err := common.NewHTTPSource(driver, cfg, "application/geo+json, application/json")
-		return nil, fmt.Errorf("nws_forecast %q: params are required (need params.url and params.user_agent)", cfg.Name)
+	if err != nil {
+		return nil, err
 	}
 
-	url, ok := cfg.ParamString("url", "URL")
+	return &ForecastSource{http: hs}, nil
-	if !ok {
-		return nil, fmt.Errorf("nws_forecast %q: params.url is required", cfg.Name)
 }
 
-	ua, ok := cfg.ParamString("user_agent", "userAgent")
+func (s *ForecastSource) Name() string { return s.http.Name }
-	if !ok {
-		return nil, fmt.Errorf("nws_forecast %q: params.user_agent is required", cfg.Name)
-	}
-
-	return &ForecastSource{
-		name:      cfg.Name,
-		url:       url,
-		userAgent: ua,
-	}, nil
-}
-
-func (s *ForecastSource) Name() string { return s.name }
 
 // Kind is used for routing/policy.
 func (s *ForecastSource) Kind() event.Kind { return event.Kind("forecast") }
 
 func (s *ForecastSource) Poll(ctx context.Context) ([]event.Event, error) {
-	_ = ctx
+	raw, meta, err := s.fetchRaw(ctx)
-	return nil, fmt.Errorf("nws.ForecastSource.Poll: TODO implement (url=%s)", s.url)
+	if err != nil {
+		return nil, err
+	}
+
+	// EffectiveAt is optional; for forecasts it’s most naturally the run “issued” time.
+	// NWS gridpoint forecasts expose generatedAt (preferred) and updateTime/updated.
+	var effectiveAt *time.Time
+	switch {
+	case !meta.ParsedGeneratedAt.IsZero():
+		t := meta.ParsedGeneratedAt.UTC()
+		effectiveAt = &t
+	case !meta.ParsedUpdateTime.IsZero():
+		t := meta.ParsedUpdateTime.UTC()
+		effectiveAt = &t
+	}
+
+	emittedAt := time.Now().UTC()
+
+	// NWS gridpoint forecast GeoJSON commonly has a stable "id" equal to the endpoint URL.
+	// That is *not* unique per issued run, so we intentionally do not use it for Event.ID.
+	// Instead we rely on Source:EffectiveAt (or Source:EmittedAt fallback).
+	eventID := common.ChooseEventID("", s.http.Name, effectiveAt, emittedAt)
+
+	return common.SingleRawEvent(
+		s.Kind(),
+		s.http.Name,
+		standards.SchemaRawNWSHourlyForecastV1,
+		eventID,
+		emittedAt,
+		effectiveAt,
+		raw,
+	)
+}
+
+// ---- RAW fetch + minimal metadata decode ----
+
+type forecastMeta struct {
+	// Present for GeoJSON Feature responses, but often stable (endpoint URL).
+	ID string `json:"id"`
+
+	Properties struct {
+		GeneratedAt string `json:"generatedAt"` // preferred “issued/run generated” time
+		UpdateTime  string `json:"updateTime"`  // last update time of underlying data
+		Updated     string `json:"updated"`     // deprecated alias for updateTime
+	} `json:"properties"`
+
+	ParsedGeneratedAt time.Time `json:"-"`
+	ParsedUpdateTime  time.Time `json:"-"`
+}
+
+func (s *ForecastSource) fetchRaw(ctx context.Context) (json.RawMessage, forecastMeta, error) {
+	raw, err := s.http.FetchJSON(ctx)
+	if err != nil {
+		return nil, forecastMeta{}, err
+	}
+
+	var meta forecastMeta
+	if err := json.Unmarshal(raw, &meta); err != nil {
+		// If metadata decode fails, still return raw; Poll will fall back to Source:EmittedAt.
+		return raw, forecastMeta{}, nil
+	}
+
+	// generatedAt (preferred)
+	genStr := strings.TrimSpace(meta.Properties.GeneratedAt)
+	if genStr != "" {
+		if t, err := nwscommon.ParseTime(genStr); err == nil {
+			meta.ParsedGeneratedAt = t.UTC()
+		}
+	}
+
+	// updateTime, with fallback to deprecated "updated"
+	updStr := strings.TrimSpace(meta.Properties.UpdateTime)
+	if updStr == "" {
+		updStr = strings.TrimSpace(meta.Properties.Updated)
+	}
+	if updStr != "" {
+		if t, err := nwscommon.ParseTime(updStr); err == nil {
+			meta.ParsedUpdateTime = t.UTC()
+		}
+	}
+
+	return raw, meta, nil
 }

internal/sources/nws/observation.go

@@ -4,74 +4,42 @@ package nws
 import (
 	"context"
 	"encoding/json"
-	"fmt"
-	"net/http"
 	"strings"
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/config"
 	"gitea.maximumdirect.net/ejr/feedkit/event"
+	nwscommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/nws"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/common"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
 )
 
 // ObservationSource polls an NWS station observation endpoint and emits a RAW observation Event.
-//
-// This corresponds to URLs like:
-//
-//	https://api.weather.gov/stations/KSTL/observations/latest
 type ObservationSource struct {
-	name      string
+	http *common.HTTPSource
-	url       string
-	userAgent string
-	client    *http.Client
 }
 
 func NewObservationSource(cfg config.SourceConfig) (*ObservationSource, error) {
 	const driver = "nws_observation"
 
-	c, err := common.RequireHTTPSourceConfig(driver, cfg)
+	hs, err := common.NewHTTPSource(driver, cfg, "application/geo+json, application/json")
 	if err != nil {
 		return nil, err
 	}
 
-	return &ObservationSource{
+	return &ObservationSource{http: hs}, nil
-		name:      c.Name,
-		url:       c.URL,
-		userAgent: c.UserAgent,
-		client:    common.NewHTTPClient(common.DefaultHTTPTimeout),
-	}, nil
 }
 
-func (s *ObservationSource) Name() string { return s.name }
+func (s *ObservationSource) Name() string { return s.http.Name }
 
-// Kind is used for routing/policy.
-// We keep Kind canonical (observation) even for raw events; Schema differentiates raw vs canonical.
 func (s *ObservationSource) Kind() event.Kind { return event.Kind("observation") }
 
-// Poll fetches NWS "latest observation" and emits exactly one RAW Event.
-// The RAW payload is json.RawMessage and Schema is standards.SchemaRawNWSObservationV1.
 func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 	raw, meta, err := s.fetchRaw(ctx)
 	if err != nil {
 		return nil, err
 	}
 
-	// Event.ID must be set BEFORE normalization (feedkit requires it).
-	// Prefer NWS-provided "id" (stable URL). Fallback to a stable computed key.
-	eventID := strings.TrimSpace(meta.ID)
-	if eventID == "" {
-		ts := meta.ParsedTimestamp
-		if ts.IsZero() {
-			ts = time.Now().UTC()
-		}
-		station := strings.TrimSpace(meta.StationID)
-		if station == "" {
-			station = "UNKNOWN"
-		}
-		eventID = fmt.Sprintf("nws:observation:%s:%s:%s", s.name, station, ts.UTC().Format(time.RFC3339Nano))
-	}
-
 	// EffectiveAt is optional; for observations it’s naturally the observation timestamp.
 	var effectiveAt *time.Time
 	if !meta.ParsedTimestamp.IsZero() {
@@ -79,11 +47,15 @@ func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 		effectiveAt = &t
 	}
 
+	emittedAt := time.Now().UTC()
+	eventID := common.ChooseEventID(meta.ID, s.http.Name, effectiveAt, emittedAt)
+
 	return common.SingleRawEvent(
 		s.Kind(),
-		s.name,
+		s.http.Name,
 		standards.SchemaRawNWSObservationV1,
 		eventID,
+		emittedAt,
 		effectiveAt,
 		raw,
 	)
@@ -91,40 +63,31 @@ func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 
 // ---- RAW fetch + minimal metadata decode ----
 
-// observationMeta is a *minimal* decode of the NWS payload used only to build
-// a stable Event.ID and a useful EffectiveAt for the envelope.
 type observationMeta struct {
 	ID         string `json:"id"`
 	Properties struct {
-		StationID string `json:"stationId"`
 		Timestamp string `json:"timestamp"`
 	} `json:"properties"`
 
-	// Convenience fields populated after decode.
 	ParsedTimestamp time.Time `json:"-"`
-	StationID       string    `json:"-"`
 }
 
 func (s *ObservationSource) fetchRaw(ctx context.Context) (json.RawMessage, observationMeta, error) {
-	b, err := common.FetchBody(ctx, s.client, s.url, s.userAgent, "application/geo+json, application/json")
+	raw, err := s.http.FetchJSON(ctx)
 	if err != nil {
-		return nil, observationMeta{}, fmt.Errorf("nws_observation %q: %w", s.name, err)
+		return nil, observationMeta{}, err
 	}
 
-	raw := json.RawMessage(b)
-
 	var meta observationMeta
-	if err := json.Unmarshal(b, &meta); err != nil {
+	if err := json.Unmarshal(raw, &meta); err != nil {
-		// If metadata decode fails, still return raw; envelope will fall back to computed ID.
+		// If metadata decode fails, still return raw; envelope will fall back to Source:EffectiveAt.
 		return raw, observationMeta{}, nil
 	}
 
-	meta.StationID = strings.TrimSpace(meta.Properties.StationID)
-
 	tsStr := strings.TrimSpace(meta.Properties.Timestamp)
 	if tsStr != "" {
-		if t, err := time.Parse(time.RFC3339, tsStr); err == nil {
+		if t, err := nwscommon.ParseTime(tsStr); err == nil {
-			meta.ParsedTimestamp = t
+			meta.ParsedTimestamp = t.UTC()
 		}
 	}
 

internal/sources/openmeteo/forecast.go

@@ -0,0 +1,110 @@
+package openmeteo
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+	"time"
+
+	"gitea.maximumdirect.net/ejr/feedkit/config"
+	"gitea.maximumdirect.net/ejr/feedkit/event"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/openmeteo"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/common"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
+)
+
+// ForecastSource polls an Open-Meteo hourly forecast endpoint and emits one RAW Forecast Event.
+type ForecastSource struct {
+	http *common.HTTPSource
+}
+
+func NewForecastSource(cfg config.SourceConfig) (*ForecastSource, error) {
+	const driver = "openmeteo_forecast"
+
+	hs, err := common.NewHTTPSource(driver, cfg, "application/json")
+	if err != nil {
+		return nil, err
+	}
+
+	return &ForecastSource{http: hs}, nil
+}
+
+func (s *ForecastSource) Name() string { return s.http.Name }
+
+func (s *ForecastSource) Kind() event.Kind { return event.Kind("forecast") }
+
+func (s *ForecastSource) Poll(ctx context.Context) ([]event.Event, error) {
+	raw, meta, err := s.fetchRaw(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	// Open-Meteo does not expose a true "issued at" timestamp for forecast runs.
+	// We use current.time when present; otherwise we fall back to the first hourly time
+	// as a proxy for the start of the forecast horizon.
+	var effectiveAt *time.Time
+	if !meta.ParsedTimestamp.IsZero() {
+		t := meta.ParsedTimestamp.UTC()
+		effectiveAt = &t
+	}
+
+	emittedAt := time.Now().UTC()
+	eventID := common.ChooseEventID("", s.http.Name, effectiveAt, emittedAt)
+
+	return common.SingleRawEvent(
+		s.Kind(),
+		s.http.Name,
+		standards.SchemaRawOpenMeteoHourlyForecastV1,
+		eventID,
+		emittedAt,
+		effectiveAt,
+		raw,
+	)
+}
+
+// ---- RAW fetch + minimal metadata decode ----
+
+type forecastMeta struct {
+	Timezone         string `json:"timezone"`
+	UTCOffsetSeconds int    `json:"utc_offset_seconds"`
+
+	Current struct {
+		Time string `json:"time"`
+	} `json:"current"`
+
+	Hourly struct {
+		Time []string `json:"time"`
+	} `json:"hourly"`
+
+	ParsedTimestamp time.Time `json:"-"`
+}
+
+func (s *ForecastSource) fetchRaw(ctx context.Context) (json.RawMessage, forecastMeta, error) {
+	raw, err := s.http.FetchJSON(ctx)
+	if err != nil {
+		return nil, forecastMeta{}, err
+	}
+
+	var meta forecastMeta
+	if err := json.Unmarshal(raw, &meta); err != nil {
+		// If metadata decode fails, still return raw; Poll will fall back to Source:EmittedAt.
+		return raw, forecastMeta{}, nil
+	}
+
+	ts := strings.TrimSpace(meta.Current.Time)
+	if ts == "" {
+		for _, v := range meta.Hourly.Time {
+			if ts = strings.TrimSpace(v); ts != "" {
+				break
+			}
+		}
+	}
+
+	if ts != "" {
+		if t, err := openmeteo.ParseTime(ts, meta.Timezone, meta.UTCOffsetSeconds); err == nil {
+			meta.ParsedTimestamp = t.UTC()
+		}
+	}
+
+	return raw, meta, nil
+}

internal/sources/openmeteo/observation.go

@@ -4,9 +4,6 @@ package openmeteo
 import (
 	"context"
 	"encoding/json"
-	"fmt"
-	"net/http"
-	"strings"
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/config"
@@ -18,58 +15,45 @@ import (
 
 // ObservationSource polls an Open-Meteo endpoint and emits one RAW Observation Event.
 type ObservationSource struct {
-	name      string
+	http *common.HTTPSource
-	url       string
-	userAgent string
-	client    *http.Client
 }
 
 func NewObservationSource(cfg config.SourceConfig) (*ObservationSource, error) {
 	const driver = "openmeteo_observation"
 
-	// We require params.user_agent for uniformity across sources (even though Open-Meteo
+	hs, err := common.NewHTTPSource(driver, cfg, "application/json")
-	// itself does not strictly require a special User-Agent).
-	c, err := common.RequireHTTPSourceConfig(driver, cfg)
 	if err != nil {
 		return nil, err
 	}
 
-	return &ObservationSource{
+	return &ObservationSource{http: hs}, nil
-		name:      c.Name,
-		url:       c.URL,
-		userAgent: c.UserAgent,
-		client:    common.NewHTTPClient(common.DefaultHTTPTimeout),
-	}, nil
 }
 
-func (s *ObservationSource) Name() string { return s.name }
+func (s *ObservationSource) Name() string { return s.http.Name }
 
 func (s *ObservationSource) Kind() event.Kind { return event.Kind("observation") }
 
-// Poll fetches Open-Meteo "current" and emits exactly one RAW Event.
 func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 	raw, meta, err := s.fetchRaw(ctx)
 	if err != nil {
 		return nil, err
 	}
 
-	eventID := buildEventID(s.name, meta)
-	if strings.TrimSpace(eventID) == "" {
-		// Extremely defensive fallback: keep the envelope valid no matter what.
-		eventID = fmt.Sprintf("openmeteo:current:%s:%s", s.name, time.Now().UTC().Format(time.RFC3339Nano))
-	}
-
 	var effectiveAt *time.Time
 	if !meta.ParsedTimestamp.IsZero() {
 		t := meta.ParsedTimestamp.UTC()
 		effectiveAt = &t
 	}
 
+	emittedAt := time.Now().UTC()
+	eventID := common.ChooseEventID("", s.http.Name, effectiveAt, emittedAt)
+
 	return common.SingleRawEvent(
 		s.Kind(),
-		s.name,
+		s.http.Name,
 		standards.SchemaRawOpenMeteoCurrentV1,
 		eventID,
+		emittedAt,
 		effectiveAt,
 		raw,
 	)
@@ -78,8 +62,6 @@ func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 // ---- RAW fetch + minimal metadata decode ----
 
 type openMeteoMeta struct {
-	Latitude         float64 `json:"latitude"`
-	Longitude        float64 `json:"longitude"`
 	Timezone         string `json:"timezone"`
 	UTCOffsetSeconds int    `json:"utc_offset_seconds"`
 
@@ -91,40 +73,20 @@ type openMeteoMeta struct {
 }
 
 func (s *ObservationSource) fetchRaw(ctx context.Context) (json.RawMessage, openMeteoMeta, error) {
-	b, err := common.FetchBody(ctx, s.client, s.url, s.userAgent, "application/json")
+	raw, err := s.http.FetchJSON(ctx)
 	if err != nil {
-		return nil, openMeteoMeta{}, fmt.Errorf("openmeteo_observation %q: %w", s.name, err)
+		return nil, openMeteoMeta{}, err
 	}
 
-	raw := json.RawMessage(b)
-
 	var meta openMeteoMeta
-	if err := json.Unmarshal(b, &meta); err != nil {
+	if err := json.Unmarshal(raw, &meta); err != nil {
-		// If metadata decode fails, still return raw; envelope will fall back to computed ID without EffectiveAt.
+		// If metadata decode fails, still return raw; envelope will omit EffectiveAt.
 		return raw, openMeteoMeta{}, nil
 	}
 
-	// Best effort: compute a stable EffectiveAt + event ID component.
-	// If parsing fails, we simply omit EffectiveAt and fall back to time.Now() in buildEventID.
 	if t, err := openmeteo.ParseTime(meta.Current.Time, meta.Timezone, meta.UTCOffsetSeconds); err == nil {
 		meta.ParsedTimestamp = t.UTC()
 	}
 
 	return raw, meta, nil
 }
-
-func buildEventID(sourceName string, meta openMeteoMeta) string {
-	locKey := ""
-	if meta.Latitude != 0 || meta.Longitude != 0 {
-		locKey = fmt.Sprintf("coord:%.5f,%.5f", meta.Latitude, meta.Longitude)
-	} else {
-		locKey = "loc:unknown"
-	}
-
-	ts := meta.ParsedTimestamp
-	if ts.IsZero() {
-		ts = time.Now().UTC()
-	}
-
-	return fmt.Sprintf("openmeteo:current:%s:%s:%s", sourceName, locKey, ts.Format(time.RFC3339Nano))
-}

internal/sources/openweather/observation.go

@@ -5,58 +5,41 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"net/http"
-	"net/url"
-	"strings"
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/config"
 	"gitea.maximumdirect.net/ejr/feedkit/event"
+	owcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/providers/openweather"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/sources/common"
 	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/standards"
 )
 
-// ObservationSource polls the OpenWeatherMap "Current weather" endpoint and emits a RAW observation Event.
-//
-// IMPORTANT UNIT POLICY (weatherfeeder convention):
-// OpenWeather changes units based on the `units` query parameter but does NOT include the unit
-// system in the response body. To keep normalization deterministic, this driver *requires*
-// `units=metric`. If absent (or non-metric), the driver returns an error.
 type ObservationSource struct {
-	name      string
+	http *common.HTTPSource
-	url       string
-	userAgent string
-	client    *http.Client
 }
 
 func NewObservationSource(cfg config.SourceConfig) (*ObservationSource, error) {
 	const driver = "openweather_observation"
 
-	c, err := common.RequireHTTPSourceConfig(driver, cfg)
+	hs, err := common.NewHTTPSource(driver, cfg, "application/json")
 	if err != nil {
 		return nil, err
 	}
 
-	if err := requireMetricUnits(c.URL); err != nil {
+	if err := owcommon.RequireMetricUnits(hs.URL); err != nil {
-		return nil, fmt.Errorf("openweather_observation %q: %w", c.Name, err)
+		return nil, fmt.Errorf("%s %q: %w", hs.Driver, hs.Name, err)
 	}
 
-	return &ObservationSource{
+	return &ObservationSource{http: hs}, nil
-		name:      c.Name,
-		url:       c.URL,
-		userAgent: c.UserAgent,
-		client:    common.NewHTTPClient(common.DefaultHTTPTimeout),
-	}, nil
 }
 
-func (s *ObservationSource) Name() string { return s.name }
+func (s *ObservationSource) Name() string { return s.http.Name }
 
 func (s *ObservationSource) Kind() event.Kind { return event.Kind("observation") }
 
 func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
-	// Re-check policy defensively (in case the URL is mutated after construction).
+	if err := owcommon.RequireMetricUnits(s.http.URL); err != nil {
-	if err := requireMetricUnits(s.url); err != nil {
+		return nil, fmt.Errorf("%s %q: %w", s.http.Driver, s.http.Name, err)
-		return nil, fmt.Errorf("openweather_observation %q: %w", s.name, err)
 	}
 
 	raw, meta, err := s.fetchRaw(ctx)
@@ -64,22 +47,21 @@ func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 		return nil, err
 	}
 
-	eventID := buildEventID(s.name, meta)
-	if strings.TrimSpace(eventID) == "" {
-		eventID = fmt.Sprintf("openweather:current:%s:%s", s.name, time.Now().UTC().Format(time.RFC3339Nano))
-	}
-
 	var effectiveAt *time.Time
 	if !meta.ParsedTimestamp.IsZero() {
 		t := meta.ParsedTimestamp.UTC()
 		effectiveAt = &t
 	}
 
+	emittedAt := time.Now().UTC()
+	eventID := common.ChooseEventID("", s.http.Name, effectiveAt, emittedAt)
+
 	return common.SingleRawEvent(
 		s.Kind(),
-		s.name,
+		s.http.Name,
 		standards.SchemaRawOpenWeatherCurrentV1,
 		eventID,
+		emittedAt,
 		effectiveAt,
 		raw,
 	)
@@ -90,27 +72,17 @@ func (s *ObservationSource) Poll(ctx context.Context) ([]event.Event, error) {
 type openWeatherMeta struct {
 	Dt int64 `json:"dt"` // unix seconds, UTC
 
-	ID   int64  `json:"id"`
-	Name string `json:"name"`
-
-	Coord struct {
-		Lon float64 `json:"lon"`
-		Lat float64 `json:"lat"`
-	} `json:"coord"`
-
 	ParsedTimestamp time.Time `json:"-"`
 }
 
 func (s *ObservationSource) fetchRaw(ctx context.Context) (json.RawMessage, openWeatherMeta, error) {
-	b, err := common.FetchBody(ctx, s.client, s.url, s.userAgent, "application/json")
+	raw, err := s.http.FetchJSON(ctx)
 	if err != nil {
-		return nil, openWeatherMeta{}, fmt.Errorf("openweather_observation %q: %w", s.name, err)
+		return nil, openWeatherMeta{}, err
 	}
 
-	raw := json.RawMessage(b)
-
 	var meta openWeatherMeta
-	if err := json.Unmarshal(b, &meta); err != nil {
+	if err := json.Unmarshal(raw, &meta); err != nil {
 		return raw, openWeatherMeta{}, nil
 	}
 
@@ -120,38 +92,3 @@ func (s *ObservationSource) fetchRaw(ctx context.Context) (json.RawMessage, open
 
 	return raw, meta, nil
 }
-
-func buildEventID(sourceName string, meta openWeatherMeta) string {
-	locKey := ""
-	if meta.ID != 0 {
-		locKey = fmt.Sprintf("city:%d", meta.ID)
-	} else if meta.Coord.Lat != 0 || meta.Coord.Lon != 0 {
-		locKey = fmt.Sprintf("coord:%.5f,%.5f", meta.Coord.Lat, meta.Coord.Lon)
-	} else {
-		locKey = "loc:unknown"
-	}
-
-	ts := meta.ParsedTimestamp
-	if ts.IsZero() {
-		ts = time.Now().UTC()
-	}
-
-	return fmt.Sprintf("openweather:current:%s:%s:%s", sourceName, locKey, ts.Format(time.RFC3339Nano))
-}
-
-func requireMetricUnits(rawURL string) error {
-	u, err := url.Parse(strings.TrimSpace(rawURL))
-	if err != nil {
-		return fmt.Errorf("invalid url %q: %w", rawURL, err)
-	}
-
-	units := strings.ToLower(strings.TrimSpace(u.Query().Get("units")))
-	if units != "metric" {
-		if units == "" {
-			units = "(missing; defaults to standard)"
-		}
-		return fmt.Errorf("url must include units=metric (got units=%s)", units)
-	}
-
-	return nil
-}

internal/standards/doc.go

@@ -5,10 +5,19 @@
 //   - Schema identifiers and versioning conventions (see schema.go).
 //   - Canonical interpretations / cross-provider mappings that are not specific to a
 //     single upstream API (e.g., shared code tables, text heuristics, unit policy).
+//   - Wire-format conventions for canonical payloads.
 //
 // Standards are used by both sources and normalizers. Keep this package free of
 // provider-specific logic and free of dependencies on internal/sources/* or
 // internal/normalizers/* to avoid import cycles.
 //
-// Provider-specific decoding and mapping lives in internal/normalizers/<provider>.
+// Wire-format conventions
+// -----------------------
+// For readability and stability, canonical payloads (weather.* schemas) should not emit
+// noisy floating-point representations. weatherfeeder enforces this by rounding float
+// values in canonical payloads to 2 digits after the decimal point at normalization
+// finalization time.
+//
+// Provider-specific decoding helpers and quirks live in internal/providers/<provider>.
+// Normalizer implementations and canonical mapping logic live in internal/normalizers/<provider>.
 package standards

internal/standards/schema.go

@@ -15,6 +15,14 @@ const (
 	SchemaRawOpenMeteoCurrentV1   = "raw.openmeteo.current.v1"
 	SchemaRawOpenWeatherCurrentV1 = "raw.openweather.current.v1"
 
+	SchemaRawNWSHourlyForecastV1         = "raw.nws.hourly.forecast.v1"
+	SchemaRawOpenMeteoHourlyForecastV1   = "raw.openmeteo.hourly.forecast.v1"
+	SchemaRawOpenWeatherHourlyForecastV1 = "raw.openweather.hourly.forecast.v1"
+
+	SchemaRawNWSAlertsV1 = "raw.nws.alerts.v1"
+
 	// Canonical domain schemas (emitted after normalization).
 	SchemaWeatherObservationV1 = "weather.observation.v1"
+	SchemaWeatherForecastV1    = "weather.forecast.v1"
+	SchemaWeatherAlertV1       = "weather.alert.v1"
 )

internal/standards/wmo.go

@@ -3,7 +3,7 @@ package standards
 import (
 	"fmt"
 
-	"gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 type WMODescription struct {

internal/standards/wmo_categories.go

@@ -1,6 +1,6 @@
 package standards
 
-import "gitea.maximumdirect.net/ejr/weatherfeeder/internal/model"
+import "gitea.maximumdirect.net/ejr/weatherfeeder/model"
 
 // This file provides small, shared helper functions for reasoning about WMO codes.
 // These are intentionally "coarse" categories that are useful for business logic,

model/alert.go

@@ -0,0 +1,78 @@
+// FILE: internal/model/alert.go
+package model
+
+import "time"
+
+// WeatherAlertRun is a snapshot of *active* alerts for a location as-of a point in time.
+//
+// This mirrors WeatherForecastRun's "one issued snapshot -> many contained items" shape:
+//
+//   - A single run may contain zero, one, or many alerts.
+//   - Runs are intended to be immutable snapshots (“provider asserted X at AsOf”).
+//
+// Normalizers should prefer to set AsOf from a provider-supplied “updated/generated” timestamp.
+// If unavailable, AsOf may be set to the poll/emit time as a fallback.
+type WeatherAlertRun struct {
+	// Optional location metadata (provider-dependent).
+	LocationID   string `json:"locationId,omitempty"`
+	LocationName string `json:"locationName,omitempty"`
+
+	// AsOf is when the provider asserted this alert snapshot is current (required).
+	AsOf time.Time `json:"asOf"`
+
+	// Optional spatial context.
+	Latitude  *float64 `json:"latitude,omitempty"`
+	Longitude *float64 `json:"longitude,omitempty"`
+
+	// Active alerts contained in this snapshot (order is provider-dependent).
+	Alerts []WeatherAlert `json:"alerts"`
+}
+
+// WeatherAlert is the canonical representation of a single alert.
+//
+// This is intentionally a “useful subset” of rich provider payloads.
+// Normalizers may populate ProviderExtras for structured provider-specific fields
+// that don’t cleanly fit the canonical shape.
+type WeatherAlert struct {
+	// Provider-stable identifier (often a URL/URI).
+	ID string `json:"id"`
+
+	// Classification / headline fields.
+	Event    string `json:"event,omitempty"`
+	Headline string `json:"headline,omitempty"`
+
+	Severity  string `json:"severity,omitempty"`  // e.g. Extreme/Severe/Moderate/Minor/Unknown
+	Urgency   string `json:"urgency,omitempty"`   // e.g. Immediate/Expected/Future/Past/Unknown
+	Certainty string `json:"certainty,omitempty"` // e.g. Observed/Likely/Possible/Unlikely/Unknown
+
+	Status      string `json:"status,omitempty"`      // e.g. Actual/Exercise/Test/System/Unknown
+	MessageType string `json:"messageType,omitempty"` // e.g. Alert/Update/Cancel
+	Category    string `json:"category,omitempty"`    // e.g. Met/Geo/Safety/Rescue/Fire/Health/Env/Transport/Infra/CBRNE/Other
+	Response    string `json:"response,omitempty"`    // e.g. Shelter/Evacuate/Prepare/Execute/Avoid/Monitor/Assess/AllClear/None
+
+	// Narrative.
+	Description string `json:"description,omitempty"`
+	Instruction string `json:"instruction,omitempty"`
+
+	// Timing (all optional; provider-dependent).
+	Sent      *time.Time `json:"sent,omitempty"`
+	Effective *time.Time `json:"effective,omitempty"`
+	Onset     *time.Time `json:"onset,omitempty"`
+	Expires   *time.Time `json:"expires,omitempty"`
+
+	// Scope / affected area.
+	AreaDescription string `json:"areaDescription,omitempty"` // often a provider string
+
+	// Provenance.
+	SenderName string `json:"senderName,omitempty"`
+
+	References []AlertReference `json:"references,omitempty"`
+}
+
+// AlertReference is a reference to a related alert (updates, replacements, etc.).
+type AlertReference struct {
+	ID         string     `json:"id,omitempty"`         // provider reference ID/URI
+	Identifier string     `json:"identifier,omitempty"` // provider identifier string, if distinct
+	Sender     string     `json:"sender,omitempty"`
+	Sent       *time.Time `json:"sent,omitempty"`
+}

model/doc.go

@@ -0,0 +1,10 @@
+// FILE: internal/model/doc.go
+// Package model defines weatherfeeder's canonical domain payload types.
+//
+// These structs are emitted as the Payload of canonical events (schemas "weather.*.vN").
+// JSON tags are treated as part of the wire contract for sinks (stdout today; others later).
+//
+// Compatibility guidance:
+//   - Prefer additive changes.
+//   - Avoid renaming/removing fields without a schema version bump.
+package model

model/forecast.go

@@ -0,0 +1,118 @@
+// FILE: internal/model/forecast.go
+package model
+
+import "time"
+
+// ForecastProduct distinguishes *what kind* of forecast a provider is offering.
+// This is intentionally canonical and not provider-nomenclature.
+type ForecastProduct string
+
+const (
+	// ForecastProductHourly is a sub-daily forecast where each period is typically ~1 hour.
+	ForecastProductHourly ForecastProduct = "hourly"
+
+	// ForecastProductNarrative is a human-oriented sequence of periods like
+	// "Tonight", "Friday", "Friday Night" with variable duration.
+	//
+	// (NWS "/forecast" looks like this; it is not strictly “daily”.)
+	ForecastProductNarrative ForecastProduct = "narrative"
+
+	// ForecastProductDaily is a calendar-day (or day-bucketed) forecast where a period
+	// commonly carries min/max values (Open-Meteo daily, many others).
+	ForecastProductDaily ForecastProduct = "daily"
+)
+
+// WeatherForecastRun is a single issued forecast snapshot for a location and product.
+//
+// Design goals:
+//   - Immutable snapshot semantics: “provider asserted X at IssuedAt”.
+//   - Provider-independent schema: normalize many upstreams into one shape.
+//   - Retrieval-friendly: periods are inside the run, but can be stored/indexed separately.
+type WeatherForecastRun struct {
+	// Identity / metadata (aligned with WeatherObservation’s StationID/StationName/Timestamp).
+	LocationID   string    `json:"locationId,omitempty"`
+	LocationName string    `json:"locationName,omitempty"`
+	IssuedAt     time.Time `json:"issuedAt"` // required: when this run was generated/issued
+
+	// Some providers include both a generated time and a later update time.
+	// Keep UpdatedAt optional; many providers won’t supply it.
+	UpdatedAt *time.Time `json:"updatedAt,omitempty"`
+
+	// What sort of forecast this run represents (hourly vs narrative vs daily).
+	Product ForecastProduct `json:"product"`
+
+	// Optional spatial context. Many providers are fundamentally lat/lon-based.
+	Latitude  *float64 `json:"latitude,omitempty"`
+	Longitude *float64 `json:"longitude,omitempty"`
+
+	// Kept to align with WeatherObservation and because elevation is sometimes important
+	// for interpreting temps/precip, even if not always supplied by the provider.
+	ElevationMeters *float64 `json:"elevationMeters,omitempty"`
+
+	// The forecast periods contained in this issued run. Order should be chronological.
+	Periods []WeatherForecastPeriod `json:"periods"`
+}
+
+// WeatherForecastPeriod is a forecast for a specific valid interval [StartTime, EndTime).
+//
+// Conceptually, it mirrors WeatherObservation (condition + measurements), but:
+// /  - It has a time *range* (start/end) instead of a single timestamp.
+// /  - It adds forecast-specific fields like probability/amount of precip.
+// /  - It supports min/max for “daily” products (and other aggregated periods).
+type WeatherForecastPeriod struct {
+	// Identity / validity window (required)
+	StartTime time.Time `json:"startTime"`
+	EndTime   time.Time `json:"endTime"`
+
+	// Human-facing period label (e.g., "Tonight", "Friday"). Often empty for hourly.
+	Name string `json:"name,omitempty"`
+
+	// Canonical day/night hint (aligned with WeatherObservation.IsDay).
+	// Providers vary in whether they explicitly include this.
+	IsDay *bool `json:"isDay,omitempty"`
+
+	// Canonical internal representation (provider-independent).
+	// Like WeatherObservation, this is required; use an “unknown” WMOCode if unmappable.
+	ConditionCode WMOCode `json:"conditionCode"`
+
+	// Provider-independent short text describing the conditions (normalized, if possible).
+	ConditionText string `json:"conditionText,omitempty"`
+
+	// Provider-specific “evidence” for troubleshooting mapping and drift.
+	ProviderRawDescription string `json:"providerRawDescription,omitempty"`
+
+	// Human-facing narrative. Not all providers supply rich text (Open-Meteo often won’t).
+	TextDescription string `json:"textDescription,omitempty"` // short phrase / summary
+	DetailedText    string `json:"detailedText,omitempty"`    // longer narrative, if available
+
+	// Provider-specific (legacy / transitional)
+	IconURL string `json:"iconUrl,omitempty"`
+
+	// Core predicted measurements (nullable; units align with WeatherObservation)
+	TemperatureC *float64 `json:"temperatureC,omitempty"`
+
+	// For aggregated products (notably “daily”), providers may supply min/max.
+	TemperatureCMin *float64 `json:"temperatureCMin,omitempty"`
+	TemperatureCMax *float64 `json:"temperatureCMax,omitempty"`
+
+	DewpointC               *float64 `json:"dewpointC,omitempty"`
+	RelativeHumidityPercent *float64 `json:"relativeHumidityPercent,omitempty"`
+	WindDirectionDegrees    *float64 `json:"windDirectionDegrees,omitempty"`
+	WindSpeedKmh            *float64 `json:"windSpeedKmh,omitempty"`
+	WindGustKmh             *float64 `json:"windGustKmh,omitempty"`
+	BarometricPressurePa    *float64 `json:"barometricPressurePa,omitempty"`
+	VisibilityMeters        *float64 `json:"visibilityMeters,omitempty"`
+	ApparentTemperatureC    *float64 `json:"apparentTemperatureC,omitempty"`
+	CloudCoverPercent       *float64 `json:"cloudCoverPercent,omitempty"`
+
+	// Precipitation (forecast-specific). Keep these generic and provider-independent.
+	ProbabilityOfPrecipitationPercent *float64 `json:"probabilityOfPrecipitationPercent,omitempty"`
+
+	// Quantitative precip is not universally available, but OpenWeather/Open-Meteo often supply it.
+	// Use liquid-equivalent mm for interoperability.
+	PrecipitationAmountMm *float64 `json:"precipitationAmountMm,omitempty"`
+	SnowfallDepthMM       *float64 `json:"snowfallDepthMm,omitempty"`
+
+	// Optional extras that some providers supply and downstream might care about.
+	UVIndex *float64 `json:"uvIndex,omitempty"`
+}

model/observation.go

@@ -0,0 +1,55 @@
+// FILE: internal/model/observation.go
+package model
+
+import "time"
+
+type WeatherObservation struct {
+	// Identity / metadata
+	StationID   string    `json:"stationId,omitempty"`
+	StationName string    `json:"stationName,omitempty"`
+	Timestamp   time.Time `json:"timestamp"`
+
+	// Canonical internal representation (provider-independent).
+	ConditionCode WMOCode `json:"conditionCode"`
+	ConditionText string  `json:"conditionText,omitempty"`
+	IsDay         *bool   `json:"isDay,omitempty"`
+
+	// Provider-specific “evidence” for troubleshooting mapping and drift.
+	ProviderRawDescription string `json:"providerRawDescription,omitempty"`
+
+	// Human-facing (legacy / transitional)
+	TextDescription string `json:"textDescription,omitempty"`
+
+	// Provider-specific (legacy / transitional)
+	IconURL string `json:"iconUrl,omitempty"`
+
+	// Core measurements (nullable)
+	TemperatureC *float64 `json:"temperatureC,omitempty"`
+	DewpointC    *float64 `json:"dewpointC,omitempty"`
+
+	WindDirectionDegrees *float64 `json:"windDirectionDegrees,omitempty"`
+	WindSpeedKmh         *float64 `json:"windSpeedKmh,omitempty"`
+	WindGustKmh          *float64 `json:"windGustKmh,omitempty"`
+
+	BarometricPressurePa *float64 `json:"barometricPressurePa,omitempty"`
+	SeaLevelPressurePa   *float64 `json:"seaLevelPressurePa,omitempty"`
+	VisibilityMeters     *float64 `json:"visibilityMeters,omitempty"`
+
+	RelativeHumidityPercent *float64 `json:"relativeHumidityPercent,omitempty"`
+	ApparentTemperatureC    *float64 `json:"apparentTemperatureC,omitempty"`
+
+	ElevationMeters *float64 `json:"elevationMeters,omitempty"`
+	RawMessage      string   `json:"rawMessage,omitempty"`
+
+	PresentWeather []PresentWeather `json:"presentWeather,omitempty"`
+	CloudLayers    []CloudLayer     `json:"cloudLayers,omitempty"`
+}
+
+type CloudLayer struct {
+	BaseMeters *float64 `json:"baseMeters,omitempty"`
+	Amount     string   `json:"amount,omitempty"`
+}
+
+type PresentWeather struct {
+	Raw map[string]any `json:"raw,omitempty"`
+}