Hyperlocal Weather Nowcasting
Atmoseer is our solution for weather nowcasting, built by a highly skilled team of experts. It brings data from our own sensors together with radar, satellite, lightning and station data into automatic nowcasting models and alerts. AI helps us tune and test both the models and the alerts.
The impact is a few kilometres wide, the warning covers an area many times its size.
It gives a window of several hours in which dangerous weather may occur locally, not when and how it reaches your place.
Once the warning is out, the weather is usually not tracked with a nowcast, and its impacts are not followed or investigated.
A forecaster has to confirm every warning. That takes deep experience with dangerous weather and the ability to work under pressure, and quality suffers when many events happen at once.
Weather nowcasting is a very short-range forecast of what the weather will do in the next minutes to hours at a specific place. It starts from the latest observations: radar, satellite, lightning, weather stations and any other source that shows what the weather is doing right now.
The time, the intensity and the form the weather takes at a specific place
Certainty that grows from the forecast to the measurement on site
Followed automatically, from the first signs of risk to what it actually did on the ground
All of this comes together in the Atmoseer engine. Our expert team built it and uses it to develop, test and tune its products directly on real-time data. Every result is verified in the real world.
Our experts build their own forecast products from weather models combined with other inputs, and keep tuning, testing and improving them. They show where the risk is, hours to days ahead.
Our flash-flood index (FFA) with ESWD reports
Our own nowcasting engine turns the latest observations and land surface conditions into a picture of what the weather will do in the coming tens of minutes, place by place, with its uncertainty quantified.
Radar, satellite, lightning, weather stations, our own sensors and other sources, brought together in one place. They are the raw material from which we build our products, models and solutions.
3–10km
Size of a severe storm core
1–5min
How often the input data update
5–10min
How often the nowcast updates
Our solution Floodar shows this system already at work: our flash-flood warnings run in daily operation on the same data and follow the water further, into the catchment and the stream.
Go to FloodarOur experts develop and refine our methods, drawing on their experience and the established scientific literature. AI/LM work alongside them throughout, so an idea becomes a working, tested method much faster.
Development and the preparation for operations run side by side on the HPC cluster of the Slovak Academy of Sciences.
Before anything goes live, it is tested on past events from our own archive.
Once live, every product is evaluated on current events in real time, directly in the Atmoseer engine.
Lombardy, 28 Aug 2026, severity:
After significant events, we reconstruct what happened and what it caused on the ground with a range of our own archive, computational and experimental tools, such as the Storm Analyser, the Damage Analyser and a lightning climatology across Europe. The Damage Analyser assesses damage with an AI model built on our team's first-hand experience from field surveys.
A plain-language warning of what the afternoon may bring, early enough to act.
Storm footprints (hail, wind and rainfall), with the method behind each one open to inspection.
Safer journeys through better forecasting.
Nowcast maps and indices through an API, to use alongside their own systems.
The hour before heavy rain, hail or strong wind arrives, for anyone whose work it would stop.
Our data, the platform, the products and the nowcasting engine run live and automatically. We are now tuning threshold alerting against real events and exploring forecasts for renewables and roads.
In operation
In operation
Running live
Running live
Tuning against real events
Research and opportunities
Latest article
More of the water has time to infiltrate and less of it returns to the air. We also asked the long records what they say about such situations — and one of our own starting hypotheses did not survive.
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