This alert expired on 9 August 2026 at 17:15 UTC. It is kept here as a record.
No stronger detection stands among the 57 recorded within 20 km of this point since 16 March 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day. 24 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 9 at 11:47AM CDT until August 9 at 12:15PM CDT by NWS Milwaukee/Sullivan WI
An estimated 1,347,383 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 9, 2026 · score 52 · 6.5 km
- July 27, 2026 · score 46 · 8.1 km
- July 27, 2026 · score 52 · 12.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 86% |
| Coordinates | 42.8345, -87.9116 |
| Nearest City | Caledonia (3 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-09T16:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e5c0a04e7f9856cbd4b82e135cc5dfac |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kenosha, WI; Racine, WI; Milwaukee, WI |
| Headline | Severe Thunderstorm Warning issued August 9 at 11:47AM CDT until August 9 at 12:15PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-08-09T12:15:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e5c0a04e7f9856cbd4b82e135cc5dfacd8d7cfda.002.1","noaa_urn:oid:2.49.0.1.840.0.a0e434a340ed671ff4ccee3233f6403fbd0a104c.002.1"] |
| Google News RssFeed | weather |
| Google News SourceName | Milwaukee Journal Sentinel |
| MergedSources | [{"id":"gnews_weather_496191_208","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786290348000,"latitude":43.04,"longitude":-87.91}] |
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 8 March 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 near Caledonia?
Calamity.live data shows a weather event with CalamityScore 52/100, near Caledonia (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.