This alert expired on 27 August 2026 at 13:30 UTC. It is kept here as a record.
No stronger detection stands among the 13 recorded within 20 km of this point since 23 May 2026 — 3 others scored the same. The last comparable one was on 7 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued August 27 at 7:31AM CDT until August 27 at 8:30AM CDT by NWS New Orleans LA
An estimated 53,642 people live within 50 km of this point.
Nearby, since 23 May 2026
- May 24, 2026 · score 39 · 5.7 km
- July 1, 2026 · score 39 · 7.0 km
- July 7, 2026 · score 34 · 10.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 39 / 100 |
| Our confidence | 82% |
| Coordinates | 29.3155, -90.3865 |
| Nearest City | Houma (45 km) |
| Population Exposed | 53.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-27T12:31:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Salvador and Lake Cataouatche; Breton Sound; Terrebonne Bay; Barataria Bay; Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm; Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM; Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm; Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM; Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM |
| Headline | Special Marine Warning issued August 27 at 7:31AM CDT until August 27 at 8:30AM CDT by NWS New Orleans LA |
| Expires | 2026-08-27T08:30:00-05:00 |
| 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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 39/100, near Houma (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.