Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 30 September 2026 at 01:15 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 29 at 8:37PM EDT until September 29 at 9:15PM EDT by NWS Key West FL
Nearby, since 17 March 2026
- September 6, 2026 · 14.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 24.2431, -81.3879 |
| Nearest City | Key West (53 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-30T00:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7ac0ba391babe56436e111d5e50506a6fddfc171.001.1 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-30T00:37:00.000Z.
First archived: 2026-09-30T00:41:41.026Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| MessageId | urn:oid:2.49.0.1.840.0.7ac0ba391babe56436e111d5e50506a6fddfc171.001.1 |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 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; 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; Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out |
| Headline | Special Marine Warning issued September 29 at 8:37PM EDT until September 29 at 9:15PM EDT by NWS Key West FL |
| Expires | 2026-09-29T21:15:00-04:00 |
| SenderName | NWS Key West FL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.519fa90d30c50c9e4c70b52f93eae8475237221f.001.1","noaa_urn:oid:2.49.0.1.840.0.6200e8dd9f6f1e3f8377880b3e25447aa67bc0bc.001.1","noaa_urn:oid:2.49.0.1.840.0.5faa787a083b5e318a92f0e5b498a67c3bc44ef9.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?