This alert expired on 28 May 2026 at 12:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 62 detections recorded within 20 km of this point since 8 March 2026. The last comparable one was on 22 May 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 28 at 6:39AM CDT until May 28 at 7:45AM CDT by NWS New Orleans LA
An estimated 842,545 people live within 50 km of this point.
Nearby, since 8 March 2026
- July 10, 2026 · score 48 · 3.2 km
- March 16, 2026 · score 48 · 8.9 km
- June 18, 2026 · score 37 · 10.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 80 % 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) | 48 / 100 |
| Our confidence | 80% |
| Coordinates | 30.3078, -90.2989 |
| Nearest City | Hammond (26 km) |
| Population Exposed | 842.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-28T11:39:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2ca447411da19eedc11f1ce01f68d3a4843a1846.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Maurepas; Lake Pontchartrain |
| Headline | Special Marine Warning issued May 28 at 6:39AM CDT until May 28 at 7:45AM CDT by NWS New Orleans LA |
| Expires | 2026-05-28T07:45:00-05:00 |
| 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 48/100, near Hammond (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.