Special Marine Warning for 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
Official alert fields
What you need to know
- Applies to
- 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
- 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... Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM... At 350 PM CDT, a severe thunderstorm capable of producing waterspouts was located 13 nm south of Isle Derniers,...
What the bulletin says to do
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.
Full official description
Bulletin details
For the following areas... 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... At 350 PM CDT, a severe thunderstorm capable of producing waterspouts was located 13 nm south of Isle Derniers, moving south at 25 knots. HAZARD...Waterspouts, wind gusts to 40 knots, and small hail. 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. The severe thunderstorm will remain over mainly open waters.
Lifecycle record
Official revisions
- Update
Special Marine Warning issued July 21 at 3:50PM CDT until July 21 at 4:15PM CDT by NWS New Orleans LA
Official revision - Alert
Special Marine Warning issued July 21 at 3:15PM CDT until July 21 at 4:15PM 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.
- CAP status
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