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 5 km from here.
This alert expired on 21 September 2026 at 00:30 UTC. It is kept here as a record.
It is the 19th strongest of the 47 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 20 at 7:20PM CDT until September 20 at 7:30PM CDT by NWS Mobile AL
Urban PEI: 378,688 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- May 25, 2026 · score 43 · 4.7 km
- September 7, 2026 · score 37 · 7.5 km
- June 30, 2026 · score 43 · 10.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.80/1 |
| Coordinates | 30.3485, -87.0994 |
| Nearest City | Midway (11 km) |
| Urban exposure index (PEI) | 378.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T00:20:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.64e84c4c5b47c281f5fd82146d4c5b17a640172d.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: 2026-09-21T00:20:00.000Z.
First archived: 2026-09-21T00:26:01.493Z. 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 | Perdido Bay Area; Pensacola Bay Area including Santa Rosa Sound; Coastal waters from Pensacola FL to Pascagoula MS out 20 NM; Coastal waters from Okaloosa-Walton County Line to Pensacola FL out 20 NM; St. Andrews Bay Waterways; Perdido Bay Area; Coastal waters from Pensacola FL to Pascagoula MS out 20 NM and 1 more areas |
| Headline | Special Marine Warning issued September 20 at 7:20PM CDT until September 20 at 7:30PM CDT by NWS Mobile AL |
| Expires | 2026-09-20T19:30:00-05:00 |
| SenderName | NWS Mobile AL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.64e84c4c5b47c281f5fd82146d4c5b17a640172d.001.1","noaa_urn:oid:2.49.0.1.840.0.8ab1ab0f9f0054cf6008ae34f276f37b51f37caa.001.1","noaa_urn:oid:2.49.0.1.840.0.150282d85aaa0e57cc6fd89c160401ab18ca3f7f.001.1","noaa_urn:oid:2.49.0.1.840.0.820b48df18086d3374286eed2120f7619d1032e0.001.1"] |
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.
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