Severe Severe Storm ● Closed
Special Marine Warning — 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 Port Fourchon Louisiana t
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
Special Marine Warning issued August 21 at 9:28PM CDT until August 21 at 10:30PM CDT by NWS New Orleans LA
Measurements
| Coordinates | 28.5873, -90.4009 |
|---|---|
| Region | 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 Fourc |
| Expires | 2026-08-21T22:30:00-05:00 |
| Nws Urgency | Immediate |
| Nws Certainty | Likely |
Official source
Weather alert data courtesy of NOAA / National Weather Service
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by US National Weather Service.
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Source updated 60 days ago (Aug 22, 2026 03:28 UTC) · we last heard from US National Weather Service 28 seconds ago
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