Right now
The most recent data we hold from NOAA arrived 20 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 23 May 2026 at 00:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 54 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 22 at 6:56PM CDT until May 22 at 7:45PM CDT by NWS New Orleans LA
An estimated 262,709 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 23, 2026 · score 43 · 5.8 km
- July 21, 2026 · score 43 · 7.0 km
- June 6, 2026 · score 43 · 7.4 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 88% |
| Coordinates | 30.2253, -88.8521 |
| Nearest City | Biloxi (20 km) |
| Population Exposed | 262.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-22T23:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.c7576ff37a5d1d88d1d900de361a5570 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Mississippi Sound; Chandeleur Sound; Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM; South Mobile Bay; Mississippi Sound; Perdido Bay Area; Coastal waters from Pensacola FL to Pascagoula MS out 20 NM; Lake Maurepas; Lake Pontchartrain |
| Headline | Special Marine Warning issued May 22 at 6:56PM CDT until May 22 at 7:45PM CDT by NWS New Orleans LA |
| Expires | 2026-05-22T19:45:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c7576ff37a5d1d88d1d900de361a5570153e17a7.001.1","noaa_urn:oid:2.49.0.1.840.0.636c5d722d26f8da36470cf9abaae2e5b3336deb.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.
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