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Severe · Special Marine WarningThis alert has expired. It is kept for reference.

Special Marine Warning issued September 7 at 5:55AM CDT until September 7

Affecting 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

In effect until: Sep 7, 2026, 12:30 PM

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

Likely impact; effects through 12:30 PM.

Strong winds will be dangerous for boaters or anyone near the water. Boaters should avoid waterspouts and never try to navigate near them. Make sure all on board are wearing life jackets. Seek shelter or move to safe harbor until hazardous weather passes.

Read the original bulletin (official text)
SMWLIX

The National Weather Service in New Orleans has issued a

* Special Marine Warning for...
Coastal Waters from Boothville LA to Southwest Pass of the
Mississippi River out 20 nm...
Coastal waters from the Southwest Pass of the Mississippi River to
Port Fourchon Louisiana out 20 NM...

* Until 730 AM CDT.

* At 555 AM CDT, a cluster of severe thunderstorms capable of
producing waterspouts was located 8 nm east of Southwest Pass Of
the Mississippi River, moving southwest at 10 knots.

HAZARD...Waterspouts and wind gusts 34 knots or greater.

SOURCE...Radar.

IMPACT...Waterspouts can quickly form and capsize boats...damage
vessels and oil rigs...and create suddenly higher waves.
Small craft could be damaged in briefly higher winds and
suddenly higher waves.

* Locations impacted include...
Southwest Pass Of the Mississippi River.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™