This alert expired on 2 September 2026 at 11:15 UTC. It is kept here as a record.
It is the 14th strongest of the 19 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 6 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued September 2 at 6:37AM EDT until September 2 at 7:15AM EDT by NWS Key West FL
An estimated 25,755 people live within 50 km of this point.
Nearby, since 16 March 2026
- September 2, 2026 · score 28 · 0.0 km
- July 6, 2026 · score 34 · 3.8 km
- March 16, 2026 · score 34 · 6.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 81 % 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) | 28 / 100 |
| Our confidence | 81% |
| Coordinates | 24.8480, -81.9620 |
| Nearest City | Key West (37 km) |
| Population Exposed | 25.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T10:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c81ed801b08c8f043985b76f034c9ef442e0d690.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms; Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms |
| Headline | Special Marine Warning issued September 2 at 6:37AM EDT until September 2 at 7:15AM EDT by NWS Key West FL |
| Expires | 2026-09-02T07:15:00-04:00 |
| SenderName | NWS Key West FL |
| 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 in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.