This alert expired on 9 May 2026 at 19:00 UTC. It is kept here as a record.
No stronger detection stands among the 58 recorded within 20 km of this point since 31 March 2026 — 19 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 9 at 2:10PM EDT until May 9 at 3:00PM EDT by NWS Detroit/Pontiac MI
An estimated 1,839,891 people live within 50 km of this point.
Nearby, since 31 March 2026
- May 18, 2026 · score 52 · 2.4 km
- June 16, 2026 · score 52 · 3.0 km
- June 16, 2026 · score 52 · 3.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 42.7583, -83.3667 |
| Nearest City | Waterford (8 km) |
| Population Exposed | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-09T18:10:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8b3465f7ce10f84791a749407bad441ea0485737.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Oakland, MI |
| Headline | Severe Thunderstorm Warning issued May 9 at 2:10PM EDT until May 9 at 3:00PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-09T15:00:00-04:00 |
| SenderName | NWS Detroit/Pontiac 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 52/100, near Waterford (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.