Alerts & warnings
Show official weather warnings on your site, and get an email or webhook when your station crosses a threshold, changes fast, or something happens.
Add an alert
- Open your site in the dashboard and go to Alerts.
- Under Alert me when, choose a condition.
- Enter the Threshold (or By more than, for a rate of change), if the condition needs one.
- Choose Notify by and While it lasts.
- Press Add alert.
Alerts go to you, not your visitors. They are checked about every 5 minutes and notify once per episode: an alert re-arms only after the condition clears, with at least 30 minutes between notifications. You can have up to 25 alerts per site, and switch each on or off. Alerts are included in Pro and the free trial.
What you can alert on
Thresholds use your site's units.
| Group | Conditions |
|---|---|
| Temperature | Temperature above or below, feels like above or below, dew point above, indoor temperature above or below |
| Humidity | Humidity above or below, indoor humidity above |
| Pressure | Pressure above or below |
| Wind | Wind gust above, average wind above |
| Rain | Rain today above, rain rate above, it started raining |
| Sun | UV index above, solar radiation above |
| Air quality | PM2.5 above, PM10 above, CO₂ above |
| Accessory sensors | Soil moisture below, soil tension above, soil temperature below, leaf wetness above, any extra sensor above or below, any extra humidity above, lightning closer than, lightning strikes today above, a water leak detector went wet |
| Station health | Station data older than, station battery below, station reception below |
| Events | An all-time record was broken, a reading was rejected as a spike, a weather-service upload is failing |
Rate of change: pressure falling or rising faster than a set amount over 3 hours (3 hPa is the classic gale signal), and temperature falling or rising faster than a set amount over 1 hour. These need their whole window of readings first, so a new 3-hour alert can take 3 hours to fire.
Events have no threshold. "It started raining" re-arms when the rain stops. The spike alert needs spike limits under Calibration. The upload alert names the weather service and its error.
Repeating while it lasts
By default an alert notifies once. Set While it lasts to repeat every hour, 3, 6 or 12 hours, or once a day while the condition holds, for a station that stays offline or a frost that lasts all night.
Accessory sensor channels
Soil, leaf and extra-sensor alerts watch every channel and notify on the worst one, naming it: one "soil moisture below 20%" alert covers all your probes. Percent probes (such as Ecowitt WH51) use Soil moisture below; Davis centibar probes, where higher means drier, use Soil tension above.
If your station goes quiet
When your station stops delivering, weather thresholds are not checked, since an old reading is not a measurement. The three station health alerts still are, so set Station data older than on every site. See Station health.
Webhooks
A webhook lets an alert call your server: flip a smart plug, page a phone, post to a chat.
- Under Alerts → Webhook, enter your HTTPS Endpoint URL and save.
- Press Send test to check your receiver.
- Set an alert's Notify by to Webhook or Email + webhook.
The payload and signature are documented in Alert webhooks.
Severe-weather warnings on your site
Your site can show official warnings for your station's area as a banner, coloured yellow, orange or red by severity and hidden when nothing is active. They come from the US National Weather Service (matched to your station's exact location) or MeteoAlarm in Europe (for your station's country).
Turn them on under Website → Homepage → Sections and tabs → Severe weather warnings. They need your station's location.
Monthly summary
Pro sites can email you a summary of the previous month: warmest day, average high, coldest night, total rain, rain days and strongest gust. It is off until you turn it on in your account.
If alert emails do not arrive, see Troubleshooting.
Station health
How Pro Weather tells you whether your hardware is delivering: the dashboard health card, the optional Station health tab on your site, and the alerts.
Alert webhooks
The webhook reference for developers - the JSON body an alert sends, the HMAC signature to verify, and the delivery rules.