Handle additional NWS forecast discussion formats

internal/normalizers/nws/forecast_discussion_test.go

@@ -215,7 +215,7 @@ func TestForecastDiscussionNormalizerSupportsCrossOfficeLayout(t *testing.T) {
 	}
 }
 
-func TestForecastDiscussionNormalizerSupportsNumberedAndKeyPointsFixtures(t *testing.T) {
+func TestForecastDiscussionNormalizerSupportsCrossOfficeKeyMessageFixtures(t *testing.T) {
 	tests := []struct {
 		name        string
 		filename    string
@@ -249,6 +249,42 @@ func TestForecastDiscussionNormalizerSupportsNumberedAndKeyPointsFixtures(t *tes
 				"Inland valleys remain dry through Saturday.",
 			},
 		},
+		{
+			name:        "as of preamble",
+			filename:    "forecast_discussion_rah_as_of_sample.html",
+			id:          "evt-discussion-rah",
+			source:      "nws-discussion-rah-test",
+			emittedAt:   time.Date(2026, 8, 2, 16, 36, 0, 0, time.UTC),
+			effectiveAt: time.Date(2026, 8, 2, 16, 35, 0, 0, time.UTC),
+			messages: []string{
+				"Scattered storms may produce locally heavy rain this afternoon.",
+				"Drier weather arrives Monday.",
+			},
+		},
+		{
+			name:        "parenthesized numeric markers",
+			filename:    "forecast_discussion_lwx_parenthesized_number_sample.html",
+			id:          "evt-discussion-lwx",
+			source:      "nws-discussion-lwx-test",
+			emittedAt:   time.Date(2026, 8, 2, 18, 1, 0, 0, time.UTC),
+			effectiveAt: time.Date(2026, 8, 2, 18, 0, 0, 0, time.UTC),
+			messages: []string{
+				"Thunderstorms remain possible near the Blue Ridge this evening.",
+				"Seasonably warm conditions continue Monday.",
+			},
+		},
+		{
+			name:        "embedded key messages in previous discussion",
+			filename:    "forecast_discussion_mfr_prev_discussion_sample.html",
+			id:          "evt-discussion-mfr-previous",
+			source:      "nws-discussion-mfr-previous-test",
+			emittedAt:   time.Date(2026, 8, 2, 22, 20, 0, 0, time.UTC),
+			effectiveAt: time.Date(2026, 8, 2, 22, 19, 0, 0, time.UTC),
+			messages: []string{
+				"Heat returns to inland valleys Monday.",
+				"Gusty afternoon winds develop east of the Cascades.",
+			},
+		},
 	}
 
 	for _, tt := range tests {