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| NWS Forecast for: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ551) Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 537 PM CDT Sat Sep 5 2026 |  |
| Tonight: West winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms late. Sunday: West winds around 5 knots. Seas 1 foot or less. Wave detail: west 1 foot at 2 seconds. A chance of showers and thunderstorms, mainly in the morning. Sunday Night: West winds 5 to 10 knots. Seas 1 foot or less. Wave detail: west 1 foot at 2 seconds. A slight chance of showers and thunderstorms after midnight. Monday: West winds 5 to 10 knots. Seas 1 foot or less. Wave detail: northwest 1 foot at 3 seconds. A chance of showers and thunderstorms, mainly in the morning. Monday Night: Southwest winds around 5 knots. Seas 1 foot or less. Wave detail: west 1 foot at 2 seconds. A slight chance of showers and thunderstorms after midnight. Tuesday: North winds around 5 knots, becoming southeast around 5 knots in the afternoon. Seas 1 foot or less. A chance of thunderstorms. Showers likely, mainly in the morning. Tuesday Night: Southeast winds around 5 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 3 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Wednesday: East winds around 5 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 3 seconds. A chance of thunderstorms. Showers likely, mainly in the morning. Wednesday Night: Southeast winds around 5 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 4 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Thursday: North winds around 5 knots, becoming south around 5 knots in the afternoon. Seas 1 foot or less. Wave detail: south 1 foot at 4 seconds. A chance of showers and thunderstorms. Thursday Night: Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ551) | |
Visit your local NWS office at: https://www.weather.gov/lix |