Right now
The most recent data we hold from NOAA arrived 1 minute ago, and this point is in it.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert expired on 21 September 2026 at 23:45 UTC. It is kept here as a record.
It is the 10th strongest of the 28 detections recorded within 20 km of this point since 30 June 2026. The last comparable one was on 20 September 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 21 at 6:51PM EDT until September 21 at 7:45PM EDT by NWS Tallahassee FL
Nearby, since 30 June 2026
- September 7, 2026 · score 16 · 10.0 km
- September 20, 2026 · score 16 · 12.1 km
- August 30, 2026 · score 22 · 16.8 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 | 0.60/1 |
| Coordinates | 29.3682, -83.2200 |
| Nearest City | Gainesville (93 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-21T22:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c651b8094345ca09dee951974440fb0dabdfb2d6.001.1 |
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: 2026-09-21T22:51:00.000Z.
First archived: 2026-09-21T22:58:03.950Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-21T23:03:36.111Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Suwannee River to Keaton Beach out 20 NM |
| Headline | Special Marine Warning issued September 21 at 6:51PM EDT until September 21 at 7:45PM EDT by NWS Tallahassee FL |
| Expires | 2026-09-21T19:45:00-04:00 |
| SenderName | NWS Tallahassee 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.
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