Document convective outlook endpoints

README.md

@@ -2,8 +2,8 @@
 
 `weatherapi` is a read-only HTTP API for weather data already stored by
 `weatherfeeder` in PostgreSQL. It exposes the latest observations, current
-conditions, alerts, forecasts, discussions, and weather stories as JSON, XML,
-or text.
+conditions, alerts, forecasts, discussions, weather stories, and convective
+outlooks as JSON, XML, or text.
 
 ## Quickstart
 
@@ -26,6 +26,11 @@ database credentials through your normal secret-management process.
 - Hourly and narrative forecasts
 - Forecast discussions
 - Weather stories
+- Convective outlooks
+
+Common query parameters include `format`, `units`, and route-specific options
+such as forecast `precision`, timezone `tz` / `TZ`, and outlook filters
+`day`, `outlookType`, and `containsLocation`.
 
 See [`docs/api.md`](docs/api.md) for the HTTP contract.