This alert expired on 18 May 2026 at 08:45 UTC. It is kept here as a record.
It is the 11th strongest of the 134 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 16 May 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 18 at 1:45AM CDT until May 18 at 4:00AM CDT by NWS La Crosse WI
Nearby, since 10 March 2026
- August 11, 2026 · score 22 · 0.0 km
- August 9, 2026 · score 22 · 0.0 km
- August 8, 2026 · score 22 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 43.8000, -89.6000 |
| Nearest City | Wisconsin Rapids (67 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T06:45:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.78b795caed0eb33b6d1c9a3204140e574ec7d7e9.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Grant, WI; Richland, WI |
| Headline | Severe Thunderstorm Watch issued May 18 at 1:45AM CDT until May 18 at 4:00AM CDT by NWS La Crosse WI |
| Expires | 2026-05-18T03:45:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | false |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.