Weather Alarms
General information
AccuWeather's Weather Alarms API surfaces forecast-based alarms for any location worldwide. An alarm fires when the daily forecast meets or exceeds a defined threshold — useful for triggering notifications, automating crew dispatch, or driving threshold-aware UI states.
Alarms are derived from AccuWeather's daily forecasts (not government-issued warnings). For severe weather warnings from official agencies, see the Alerts API.
→ See the Weather Alarms Guide and Parameters for endpoint details and request patterns.
Alarm thresholds
| Alarm | Imperial threshold | Metric threshold |
|---|---|---|
| Rain | 0.5 inch | 12.7 mm |
| Snow | 1 inch | 2.54 cm |
| Ice | 0.1 inch | 0.254 mm |
| Sustained Wind | 30 mph | 48 kph |
| Wind Gust | 40 mph | 64 kph |
| Thunderstorm Probability | 75% | 75% |
Forecast windows
Daily alarms can be retrieved for 1, 5, 10, 15, or 25 days ahead.
Requirements
Alarm searches require a LocationKey. Use the Locations API to look one up.
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