This alert expired on 3 September 2026 at 04:45 UTC. It is kept here as a record.
It is the 20th strongest of the 43 detections recorded within 20 km of this point since 14 April 2026. The last comparable one was on 2 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued September 2 at 11:39PM EDT until September 3 at 12:45AM EDT by NWS Detroit/Pontiac MI
An estimated 2,498,993 people live within 50 km of this point.
Nearby, since 14 April 2026
- June 14, 2026 · score 52 · 6.7 km
- June 14, 2026 · score 52 · 8.0 km
- April 15, 2026 · score 52 · 9.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 82% |
| Coordinates | 42.1341, -83.1459 |
| Nearest City | Trenton (3 km) |
| Population Exposed | 2.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T03:39:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.aab77f28468d1d7f2a6d049dc650a9c3b42823eb.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Detroit River |
| Headline | Special Marine Warning issued September 2 at 11:39PM EDT until September 3 at 12:45AM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-09-03T00:45:00-04:00 |
| 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 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 Trenton?
Calamity.live data shows a weather event with CalamityScore 46/100, near Trenton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.