WeatherAlarm lets you know in time about storms, hail and heavy rain, with storm path forecasts, community reports within 20 km and real-time radar. For all of Slovenia. Free.
📖 My story →From the first drops to hail: the app monitors radar every 5 minutes and notifies you when something is heading your way.
Push notification when a storm or hail is approaching your location — with estimated arrival time and distance to precipitation.
Animated forecast of where the cell is moving in the next minutes, calculated from radar images.
Users report hail, lightning or heavy rain live, and everyone within 20 km gets a notification.
Animated radar with real precipitation, updated every 5 minutes, with history from recent days.
Forecast the weather, collect points and climb the leaderboard of top forecasters.
Share your storm photos and like the best community shots.
A 10-day forecast for your location, the meteorologist's text forecast with the time it was issued, and official warnings.
Lightning strikes on the map, live and next to the radar, so you can see where the storm is really charged.
Earthquakes from INGV and satellite heat spots from NASA FIRMS. When something happens near you, a card appears on the home screen.
Animated wind flow at ground level and at 1500 and 3000 metres, up to 48 hours ahead. Tapping the map opens a vertical profile: how the wind veers with height and where a balloon would end up.
Precipitation probability from 40 model runs and a map of storm ingredients (energy, wind shear, cloud base height), up to two days ahead.
Heat wave, sudden cooling, first frost, the end of a dry spell or snowfall: when the weather turns, a card with the details appears on the home screen.
After the latest radar image, the animation shows where the rain will move over the next 50 minutes, so you can see at a glance whether it is heading your way.
How many centimetres of fresh snow will fall in the next 48 hours, from the ICON-D2 model at 2 km resolution. The radar shows snow and sleet in their own colours.
Once a user earns Weather Master status through reports, their confirmation from the ground edits the raw radar pixels before they reach the cell detection algorithm. If a master confirms hail where the radar sees none, the algorithm sees it too and the notifications follow. The radar image you see on the map stays untouched.
WeatherAlarm did not appear last year. The first sketches date from 2010 and the first Android version was released in February 2012. Since then a simple idea, working out from radar images where the rain is heading, has grown into a system with its own algorithms, path forecasting and reports from users.
Read the full story →
What the press writes about the app and how it was built.
An article on how a developer from Mengeš builds, in his free time, an app that works out when the rain will catch you.
Read the article
A two-page interview on how a 2010 idea grew into a system with its own algorithms, storm path prediction and community reports.
Read the article Print edition (PDF, pp. 14 and 15)Real storm and sky photos from Slovenia, shared by WeatherAlarm users. Upload yours in the app.
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