Special Marine Warning Issued for Coastal Louisiana Waters Near Port Fourchon and Grand Isle
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
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The National Weather Service has issued a Special Marine Warning for coastal Louisiana waters until 1:00 AM CDT due to severe thunderstorms capable of producing waterspouts.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Coastal Louisiana
- Issued
- April 6, 2026
- Issuing authority
- NWS New Orleans
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Coastal Louisiana.
Alert Details
The National Weather Service in New Orleans LA has issued a Special Marine Warning for coastal waters in the Gulf of Mexico. This alert is classified as a severe threat with immediate urgency, as radar indicates hazardous conditions moving through the region.
Affected Areas
The warning covers the coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon, Louisiana, extending out 20 nautical miles. Specific locations impacted include:
- Barataria Bay
- Grand Isle
What You Should Do
Boaters and individuals near the water should take immediate safety precautions:
- Ensure all persons on board are wearing life jackets.
- Seek shelter or move to a safe harbor immediately until the hazardous weather passes.
- If caught on open water, stay below deck if possible and remain away from ungrounded metal objects to avoid frequent lightning.
- A Tornado Watch also remains in effect for southeastern Louisiana until 2:00 AM CDT.
Expected Conditions
Severe thunderstorms were located along a line extending from near Port Sulphur to near Golden Meadow, moving southeast at 25 knots. Expected hazards include:
- Waterspouts: These can form quickly and capsize boats, damage vessels and oil rigs, and create suddenly higher waves.
- Wind: Gusts up to 40 knots are expected.
- Lightning: Frequent lightning is occurring with these storms.
Timeline
The Special Marine Warning is effective as of 11:59 PM CDT on March 11, 2026. The warning is currently scheduled to expire at 1:00 AM CDT on March 12, 2026.
Original source: NOAA Official Notice ↗
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