This alert expired on 21 July 2026 at 22:00 UTC. It is kept here as a record.
It is the 6th strongest of the 17 detections recorded within 20 km of this point since 17 June 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 21 at 3:50PM CDT until July 21 at 5:00PM CDT by NWS New Orleans LA
Nearby, since 17 June 2026
- September 1, 2026 · score 16 · 10.3 km
- July 22, 2026 · score 22 · 14.5 km
- July 12, 2026 · score 22 · 19.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 59 % 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) | 16 / 100 |
| Our confidence | 59% |
| Coordinates | 29.0912, -91.1900 |
| Nearest City | Bayou Cane (73 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-21T20:50:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5fa21a56b8ac6d5fa8d80cd144aff5aba83b0760.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm; Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM |
| Headline | Special Marine Warning issued July 21 at 3:50PM CDT until July 21 at 5:00PM CDT by NWS New Orleans LA |
| Expires | 2026-07-21T17:00:00-05:00 |
| 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 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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.