This alert expired on 10 August 2026 at 04:30 UTC. It is kept here as a record.
It is the 8th strongest of the 41 detections recorded within 20 km of this point since 3 April 2026. The last comparable one was on 1 August 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 9 at 10:50PM CDT until August 9 at 11:30PM CDT by NWS Milwaukee/Sullivan WI
An estimated 470,936 people live within 50 km of this point.
Nearby, since 3 April 2026
- June 24, 2026 · score 67 · 12.7 km
- June 10, 2026 · score 41 · 14.0 km
- July 27, 2026 · score 72 · 14.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 42.5867, -88.4683 |
| Nearest City | Woodstock (31 km) |
| Population Exposed | 470.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T03:50:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.946f64656d5ceec1eb5a06f6fb2f487529da07e8.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kenosha, WI; Racine, WI; Walworth, WI |
| Headline | Severe Thunderstorm Warning issued August 9 at 10:50PM CDT until August 9 at 11:30PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-08-09T23:30:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.