Right now
The most recent data we hold from NOAA arrived 4 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 12 km from here.
This alert expired on 20 September 2026 at 22:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 9 detections recorded within 20 km of this point since 17 July 2026. 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 September 20 at 4:27PM EDT until September 20 at 6:00PM EDT by NWS Tallahassee FL
Urban PEI: 141,077 within a heuristic 50 km radius; not unique people.
Nearby, since 17 July 2026
- July 17, 2026 · score 43 · 4.4 km
- July 27, 2026 · score 43 · 11.9 km
- September 20, 2026 · score 37 · 12.3 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 28.7151, -82.8291 |
| Nearest City | Spring Hill (39 km) |
| Urban exposure index (PEI) | 141.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-20T20:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.e86c386de123fbef2a3374a0d5093c9f703dd025.001.1 |
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: 2026-09-20T20:27:00.000Z.
First archived: 2026-09-20T20:32:10.928Z. 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 |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Suwannee River to Keaton Beach out 20 NM; Tampa Bay waters; Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM |
| Headline | Special Marine Warning issued September 20 at 4:27PM EDT until September 20 at 6:00PM EDT by NWS Tallahassee FL |
| Expires | 2026-09-20T18:00:00-04:00 |
| SenderName | NWS Tallahassee FL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e86c386de123fbef2a3374a0d5093c9f703dd025.001.1","noaa_urn:oid:2.49.0.1.840.0.e487ce675590b2fd16f45014b249fcefbbd39c80.001.1","noaa_urn:oid:2.49.0.1.840.0.a5fe429e94c7f48c23ad3ab52f018a736bae16db.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | 3 W Crystal River |
| Iem County | Citrus |
| Iem State | FL |
| Iem Wfo | TBW |
| Iem Remark | Mesonet station 0212W Marine Science Station reported a 44 mph wind gust. |
| MergedSources | [{"id":"iem_G_28.900_-82.650_1789934400000","source":"iem","severity":"low","severityValue":25,"timestamp":1789934400000,"latitude":28.9,"longitude":-82.65}] |
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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