Stormo
Stormo watches the forecast for the provinces you follow and alerts you when your rules are met — rain starting in two hours, strong wind, frost, heat.
Free · No account required · Android, iOS, TV and watches
Forecast alerts for every country in the world — filtered down to what actually concerns you.
Follow the province or state where you live and decide when Stormo should alert you: rain starting soon, heavy rain, strong wind, frost, heat and more, each with your own value. Stormo Pro lets you follow several provinces or whole countries.
Rain start, heavy rain, strong wind, frost or cold, heat, snow, thunderstorms, fog and high waves: switch each rule on or off, pick its value and choose when to hear about it — as soon as it is forecast, or 1 day, 6 hours or 2 hours before. For rain, choose 1, 2, 3 or 6 hours or 1 day before it starts.
Silence alerts overnight. An alert that is still active when quiet hours end reaches you then.
Every current and upcoming alert is shown on the map at its province, coloured by level; tap it to see the details. For each region you follow you also see the current weather and the next 12 hours of temperature and rain.
Each alert says what is coming, when it starts and how strong it gets — 12 mm/h, 72 km/h, −3 °C — in your language and units.
See when an alert starts and when it ends, with the time left counting down. Alerts that end, or no longer appear in a newer forecast, drop off the map automatically.
Stormo computes its alerts from NOAA's global GFS weather model and WaveWatch III wave model, and cross-checks them with ECMWF's IFS model to cut false alarms. Current conditions come from airport weather observations (METAR). Alerts are forecasts and can be wrong.
How many warnings, the highest level, what is active right now and which warning types were most common — for today, 7 days and 30 days.
Rain, thunder, wind, snow, fog, heat, cold and sea alerts each have their own sound, so you know what is coming before you look. Add the home-screen widget on Android or iOS to see the latest warning at a glance.
On Android TV the warning appears over whatever you are watching, with sound. On Apple TV it appears while Stormo is open. Open the details with your remote.
On Wear OS and Apple Watch, the watch app, tile and complication show the latest warning at a glance.
With Stormo Pro, follow the provinces where family and friends live — or whole countries — each with its own alert rules.
Three steps when you first open the app, and you are done.
Stormo suggests the province you are in; confirm it or pick another one. You can change it later in Settings.
Choose what should notify you for your region — rain, wind, frost, heat and more. Sensible defaults are already switched on.
Grant the notification permission when the system asks. Without it your choices are saved, but nothing can reach you.
Almost every "I'm not getting weather warnings" report comes down to one of these four things. Work through them in order.
Open Settings. Following a region is not the same as enabling alerts for it: each region has its own toggle and its own alert rules. If every region is muted, no push will ever be sent.
If a region's wind rule is set to 100 km/h, gusts of 70 km/h in the forecast will not notify you. Likewise, a rule you switched off never sends anything.
Android 13+ and iOS both require an explicit permission. If you dismissed the prompt, the app shows a banner and keeps your settings — alerts start arriving the moment you allow notifications in system settings.
During quiet hours no alert gets through. With quiet hours 23:00–07:00, an alert at 02:00 is held back by design and reaches you after 07:00 if it is still active.
Settings has a "Not receiving notifications?" screen that tests push support, registration with the notification service, the system permission, the alerts channel, your followed regions, quiet hours and battery restrictions one by one, and tells you which one is failing. It can also send a test notification straight away.
Stormo colours every alert on a four-colour scale by the strength of the predicted value — similar to the scales many national weather services use.
| Level | What it usually means |
|---|---|
| Green warning | No particular danger, or information only. |
| Yellow warning | Potentially dangerous weather that is not unusual. Be aware, especially if you are outdoors or travelling. |
| Orange warning | Dangerous weather, unusual in intensity. Damage and disruption are likely; be prepared and follow official advice. |
| Red warning | Very dangerous, exceptional weather. Serious damage and danger to life are possible; take action now. |
The colours are Stormo's own summary of the forecast value (for example, rain from 20 mm/h or gusts from 100 km/h are red), not an official classification. In danger, follow your local authorities.
The words you see in the app — and what they actually mean.
The questions we are asked by email most often.
No account, no location tracking, no alerts you did not ask for.
The app never requests GPS or location access. You choose your provinces from a list.
Nothing to sign up for. Your device gets an anonymous identifier and that is all we hold.
Rules, values and quiet hours per region mean you decide what is worth a buzz — not us.
Install Stormo and set up your province and alert rules in about a minute.