Special Marine Warning for Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm
Official alert fields
What you need to know
- Effective
- Ended
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
For the following areas... Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm... At 728 PM CDT, a cluster of severe thunderstorms capable of producing waterspouts were located along a line extending from 6 nm northeast of Point Au Fer Island to Caillou Bay, moving west at 15 knots....
What the bulletin says to do
Strong winds will be dangerous for boaters or anyone near the water. Make sure all on board are wearing life jackets. Seek shelter or move to safe harbor until hazardous weather passes. Report severe weather to the Coast Guard or the National Weather Service.
Full official description
Bulletin details
For the following areas... Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm... At 728 PM CDT, a cluster of severe thunderstorms capable of producing waterspouts were located along a line extending from 6 nm northeast of Point Au Fer Island to Caillou Bay, moving west at 15 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Radar indicated. 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... Isle Derniers and Caillou Bay.
Lifecycle record
Official revisions
- Update
Special Marine Warning issued July 20 at 7:29PM CDT until July 20 at 7:45PM CDT by NWS New Orleans LA
Official revision - Update
Special Marine Warning issued July 20 at 7:12PM CDT until July 20 at 7:45PM CDT by NWS New Orleans LA
Official revision - Alert
Special Marine Warning issued July 20 at 6:42PM CDT until July 20 at 7:45PM CDT by NWS New Orleans LA
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS New Orleans LA. This page reorganizes official fields and does not add a forecast or expand the affected area.
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