Right now
The most recent data we hold from NOAA arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 23 May 2026 at 01:00 UTC. It is kept here as a record.
What the source measured
NOAA reported: Special Marine Warning issued May 22 at 6:53PM CDT until May 22 at 8:00PM CDT by NWS Mobile AL
Urban PEI: 262,709 within a heuristic 50 km radius; not unique people.
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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 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) | 43 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 30.2368, -88.8759 |
| Nearest City | Biloxi (18 km) |
| Urban exposure index (PEI) | 262.7K within 50 km |
| Impact Tier | significant |
| Date | 2026-05-22 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.636c5d722d26f8da36470cf9abaae2e5 |
Physical priority index · v1. 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: 2026-05-22 — time not reported.
First archived: 2026-05-22T23:53:56.732Z. 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 | South Mobile Bay; Mississippi Sound; Perdido Bay Area; Coastal waters from Pensacola FL to Pascagoula MS out 20 NM; Mississippi Sound; Chandeleur Sound; Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM; Lake Maurepas; Lake Pontchartrain |
| Headline | Special Marine Warning issued May 22 at 6:53PM CDT until May 22 at 8:00PM CDT by NWS Mobile AL |
| Expires | 2026-05-22T20:00:00-05:00 |
| SenderName | NWS Mobile AL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.636c5d722d26f8da36470cf9abaae2e5b3336deb.001.1","noaa_urn:oid:2.49.0.1.840.0.b2d8104e9ab930d50c903e2daf5e23cba5b08092.001.1","noaa_urn:oid:2.49.0.1.840.0.e197d7961b8ee6f6357c40ec2be84505509e8266.001.1"] |
| Iem TypeSummary | F |
| Iem City | 2 SW Gulfport |
| Iem County | Harrison |
| Iem State | MS |
| Iem Wfo | LIX |
| Iem Remark | Intersection of Hwy 90 and 20th Ave flooded according to Harrison SO. |
| MergedSources | [{"id":"iem_F_30.380_-89.060_1779476880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779476880000,"latitude":30.38,"longitude":-89.06},{"id":"iem_M_30.210_-88.980_1779489360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779489360000,"latitude":30.21,"longitude":-88.98},{"id":"iem_F_30.370_-89.090_1779476580000","source":"iem","severity":"low","severityValue":25,"timestamp":1779476580000,"latitude":30.37,"longitude":-89.09}] |
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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