Showers and Thunderstorms from the Great Lakes into the Southern Plains
Frontal boundary and wave of low pressure will keep an active weather pattern from the Great Lakes region through the southern Plains the next couple of days. Isolated instances of severe thunderstorms and flash flooding are possible. Meanwhile, as summer comes to a close, above normal temperatures continue for central and eastern U.S. - especially for most of Puerto Rico with excessive heat. Read More >
| NWS Forecast for: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 1231 PM CDT Sun Sep 21 2025 | |
| This Afternoon: Southeast winds around 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 5 seconds. A slight chance of showers and thunderstorms. Tonight: Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas around 2 feet. Wave detail: southeast 2 feet at 5 seconds. A slight chance of thunderstorms in the evening. A slight chance of showers. Monday: Southeast winds 5 to 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 5 seconds. A chance of showers and thunderstorms. Monday Night: Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 5 seconds. A slight chance of showers. Tuesday: Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 5 seconds. A slight chance of showers and thunderstorms. Tuesday Night: Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 1 foot at 5 seconds. A slight chance of showers. Wednesday: South winds 5 to 10 knots. Seas 1 foot or less. Wave detail: south 1 foot at 4 seconds. A chance of showers. A slight chance of thunderstorms in the afternoon. Wednesday Night: Southwest winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight. Wave detail: south 1 foot at 5 seconds, becoming south 1 foot at 4 seconds. A chance of showers with a slight chance of thunderstorms. Thursday: West winds around 10 knots. Seas around 2 feet. Wave detail: southwest 2 feet at 4 seconds and southeast 1 foot at 5 seconds. A chance of thunderstorms. Showers likely. Thursday Night: West winds around 10 knots. Seas around 2 feet. Wave detail: west 2 feet at 4 seconds and southeast 1 foot at 5 seconds. A chance of thunderstorms. Showers likely, mainly in the evening. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) | |
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