This alert expired on 9 May 2026 at 15:00 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 25 April 2026 — 14 others scored the same. 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 May 9 at 9:00AM CDT until May 9 at 10:00AM CDT by NWS New Orleans LA
An estimated 262,709 people live within 50 km of this point.
Nearby, since 25 April 2026
- June 16, 2026 · score 43 · 6.8 km
- May 24, 2026 · score 43 · 12.1 km
- July 7, 2026 · score 22 · 14.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % 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 | 81% |
| Coordinates | 30.0453, -88.9006 |
| Nearest City | Biloxi (39 km) |
| Population Exposed | 262.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-09T14:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9bb69d916ec1aa8fd68772c9057994d9417b873c.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Mississippi Sound; Breton Sound; Chandeleur Sound; Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM; Coastal waters from Pascagoula Mississippi to Stake Island Louisiana out 20 to 60 NM |
| Headline | Special Marine Warning issued May 9 at 9:00AM CDT until May 9 at 10:00AM CDT by NWS New Orleans LA |
| Expires | 2026-05-09T10:00:00-05:00 |
| SenderName | NWS New Orleans LA |
| 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.