This alert expired on 10 August 2026 at 07:49 UTC. It is kept here as a record.
No stronger detection stands among the 38 recorded within 20 km of this point since 3 April 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 10 at 3:39AM EDT until August 10 at 3:45AM EDT by NWS Grand Rapids MI
An estimated 532,096 people live within 50 km of this point.
Nearby, since 3 April 2026
- August 9, 2026 · score 43 · 22.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 82 % 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) | 48 / 100 |
| Our confidence | 82% |
| Coordinates | 42.6300, -85.7660 |
| Nearest City | Kentwood (29 km) |
| Population Exposed | 532.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T07:39:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allegan, MI |
| Headline | Severe Thunderstorm Warning issued August 10 at 3:39AM EDT until August 10 at 3:45AM EDT by NWS Grand Rapids MI |
| Expires | 2026-08-10T03:49:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| 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.
Calamity.live data shows a weather event with CalamityScore 48/100, near Kentwood (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.