For PDR and dent repair technicians in Europe
Spot hail.Head out informed.
Relevant hail alerts for your area. With location, estimated hail size and storm track – straight to your phone.
By email and push. Matched to your rules.
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Your area.
You choose where you want to hear about hail.
Your threshold.
You choose the hail size and confidence level.
Your alert.
HailSignal alerts you when your rules match.
The data behind the analysis
Data sources for our analyses
Radar, weather models and supporting evidence from traceable sources. HailSignal analyses these data – each alert identifies its sources.
Hail radar · Switzerland
Radar, lightning & models · USA
Weather models & official warnings
Official warnings · Europe
Satellite lightning data · Europe
NWS ground reports · Iowa State University
Official warnings · Canada
More data sources and their role
National weather services via MeteoAlarm
Warnings come from the respective national weather services. Their origin is retained with the evidence.
Radar sources under evaluation
These sources are used for observation and calibration. They do not currently generate customer alerts on their own.
Reference and geographic data
UCAR/ICECHIP provides ground references for separate comparisons. Maps, place names, time zones and warning boundaries use additional datasets; their attribution appears on the map and in the legal notice.
The providers supply source data. HailSignal produces the analyses and assessments.
Sources & usage informationCoverage
Where HailSignal keeps watch.
Weather data and evidence, with a clear view of what’s ready. Check whether your area is covered before you start.
- Live
Switzerland & the Alps
Within the Swiss radar network’s range, including nearby areas up to 150 km from a radar.
- Live
North America
The contiguous USA and parts of southern Canada and northern Mexico within radar range.
- Evidence source
Official warnings from 14 countries
European hail warnings support alerts as independent evidence.
- In development
Over 20 countries under observation
We collect data and calibrate. Customer alerts start only after validation.
Swiss hail radar: 1 April to 30 September. Outside this season, this source provides no current hail estimates. The US radar feed is separate.
All countries in detailHere’s what you get
What matters. In one alert.
Where is hail falling? How large is it estimated to be? Where is the storm heading? Get the information that helps you plan your next move.
Tuesday, 1 September
HailSignalnowHail near Windisch
Estimated up to 61 mm. The storm is moving towards Embrach and Gottmadingen.
- Hail size
- ~61 mm
- Confidence
- C2
Where is the storm heading?
Location and direction at a glance.
Illustrative example. Hail size and storm track are estimates; C2 does not mean damage has been confirmed.
How alerts are createdUnderstanding an alert
Confidence, made clear.
Estimated hail size and confidence are assessed separately. So you can put each alert into context.
How large is the hail?
- Class 2
- 20–<30 mm
Dents possible.
- Class 3
- 30–<45 mm
Elevated damage potential.
- Class 4
- 45 mm and above
High damage potential.
How sure are we?
- C1
- Possible
An initial radar signal, not yet confirmed.
- C2
- Likely
Matching radar products or a second, independent piece of evidence.
- C3
- Very likely
With a verified observation from the ground.
- C4
- Confirmed
Four independent confirmations on site.
Large hail does not automatically mean high confidence. Downgrades are reported too.
How we check the evidence