This alert expired on 17 March 2026 at 05:00 UTC. It is kept here as a record.
No stronger detection stands among the 34 recorded within 20 km of this point since 17 March 2026 — 20 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: Special Marine Warning issued March 17 at 12:44AM EDT until March 17 at 1:00AM EDT by NWS Key West FL
An estimated 25,755 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 3, 2026 · score 34 · 11.6 km
- July 27, 2026 · score 34 · 18.4 km
- July 24, 2026 · score 34 · 22.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 83 % 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) | 34 / 100 |
| Our confidence | 83% |
| Coordinates | 24.4459, -81.5652 |
| Nearest City | Key West (25 km) |
| Population Exposed | 25.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T04:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.36a8abb04e5ffe932592863d9b58edf9 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out; Bayside and Gulfside from Craig Key to West End of Seven Mile Bridge; Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms; Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef; Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM |
| Headline | Special Marine Warning issued March 17 at 12:44AM EDT until March 17 at 1:00AM EDT by NWS Key West FL |
| Expires | 2026-03-17T01:00:00-04:00 |
| SenderName | NWS Key West FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.36a8abb04e5ffe932592863d9b58edf996d40945.002.1","noaa_urn:oid:2.49.0.1.840.0.d1ab331fc0bba3abe7d9dd10f1ce4a2bf97d7f73.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 8 SSE Sugarloaf Key |
| Iem County | GMZ044 |
| Iem State | FL |
| Iem Wfo | KEY |
| Iem Remark | A WNW wind gust of 37 knots, or 43 mph, was recorded by the XASL WeatherFlow mesonet site at American Shoal Light. |
| MergedSources | [{"id":"iem_M_24.530_-81.520_1773719040000","source":"iem","severity":"low","severityValue":25,"timestamp":1773719040000,"latitude":24.53,"longitude":-81.52}] |
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 Key West?
Calamity.live data shows a weather event with CalamityScore 34/100, near Key West (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.