This alert expired on 16 March 2026 at 10:30 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 16 March 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 4:19AM CDT until March 16 at 5:30AM CDT by NWS New Orleans LA
An estimated 158,740 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 21, 2026 · score 43 · 14.5 km
- June 25, 2026 · score 16 · 15.3 km
- June 3, 2026 · score 43 · 21.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 82 % 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 | 82% |
| Coordinates | 29.9715, -89.1625 |
| Nearest City | Long Beach (42 km) |
| Population Exposed | 158.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T09:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.44eadc85ac4a4d64122b894b4d74830015bbab70.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Mississippi Sound; Chandeleur Sound; Breton Sound; Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm; 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 March 16 at 4:19AM CDT until March 16 at 5:30AM CDT by NWS New Orleans LA |
| Expires | 2026-03-16T05:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 ESE Slidell |
| Spc County | St. Tammany |
| Spc State | LA |
| Spc Comments | Small tree down on Marsha Dr. (LIX) |
| MergedSources | [{"id":"spc_wind_30.28_-89.76_346","source":"spc","severity":"medium","severityValue":45,"timestamp":1773648060000,"latitude":30.28,"longitude":-89.76}] |
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.