Port Fourchon, LA to Lower Atchafalaya River, LA out 20 - 60 NM Marine Forecast
| Tonight...West Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: West 4 Feet At 6 Seconds. A Slight Chance Of Showers And Thunderstorms This Evening. A Chance Of Showers And Thunderstorms After Midnight. |
| Monday...West Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: West 2 Feet At 6 Seconds. A Slight Chance Of Showers And Thunderstorms In The Morning. |
| Monday Night...Southwest Winds 5 To 10 Knots. Seas Around 2 Feet In The Evening, Then 1 Foot Or Less. Wave Detail: West 2 Feet At 5 Seconds, Becoming West 1 Foot At 5 Seconds. |
| Tuesday...West Winds 5 To 10 Knots. Seas 1 Foot Or Less. Wave Detail: Southwest 1 Foot At 5 Seconds. |
| Tuesday Night...Southwest Winds 5 To 10 Knots. Seas 1 Foot Or Less. Wave Detail: Southwest 1 Foot At 5 Seconds. |
| Wednesday...South Winds Around 5 Knots. Seas 1 Foot Or Less. Wave Detail: South 1 Foot At 5 Seconds. |
| Wednesday Night...South Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 6 Seconds. |
| Thursday...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms. |
| Thursday Night...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Friday...East Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. A Chance Of Showers And Thunderstorms, Mainly In The Morning. |
| Friday Night...East Winds Around 10 Knots. Seas Around 3 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 620pm CDT Sunday August 2 2026 .SHORT TERM... (Now through Wednesday) Issued at 1220pm CDT Sunday August 2 2026 As expected the "cold" front is now located near the coast and slightly drier air is filtering into the local area from the north/northwest with about a 10 degree gradient in dewpoints across the region as of 11am. Scattered to numerous showers and isolated thunderstorms in coastal areas will continue to push into the Gulf as the surface front slowly sinks southward through the remainder of the afternoon. The diffuse boundary will remain in place or drift back northward across the northern Gulf through midweek. However, with dry air through the mid and upper levels, precipitable water will be well below normal for this time of year, which should keep most rain chances low. Will mostly carry silent 10 POPs through Wednesday, with slightly higher chances in areas near the coast Tues/Wednesday where sea breeze boundaries could provide more of a focus for isolated showers/storms. Temperatures will remain near to slightly above normal with lows in the 70s and highs in the low to mid 90s. The drier air should help keep afternoon maximum heat index values below advisory criteria, though a few places could peak near or just above 105 degrees each day. Long Term (Thursday through Saturday) Issued at 1220pm CDT Sunday August 2 2026 Going into the latter part of the week, surface and low level winds will become more established from the south/southeast as high pressure shifts and the local area ends up on the western periphery of the high. These onshore winds will bring deeper Gulf moisture back into the area with precipitable water values nearing normal levels by Thursday/Friday and possibly slightly above normal by Saturday. The increased moisture should lead to gradually increasing rain chances across the area with isolated to scattered showers and storms Thursday and Friday afternoons and generally scattered showers and storms Saturday afternoon. As moisture increases, daily maximum heat index values will also gradually increase. However, the current forecast keeps peak values just below advisory criteria, generally topping out in the 103-106 range each day. Warmer than normal ambient temperatures will return with overnight lows mainly in the mid to upper 70s and afternoon highs in the mid 90s. Still some minor potential for tropical moisture moving through the northern Gulf to affect the area some time during the Friday/Saturday time frame, but this is looking less likely with he previously bullish operational GFS (Global Forecast System) now keeping the bulk of the moisture offshore. It has come more in line with its ensemble mean, indicating near normal moisture content across the area instead of significantly higher than normal. Marine Issued at 1220pm CDT Sunday August 2 2026 Winds will continue to gradually ease as the pressure gradient relaxes across the coastal waters. Scattered showers and storms will linger across the open waters through early Monday morning, becoming much more isolated through the first part of the work week. Wind direction will generally remain westerly with some variation between west-northwest an west-southwest through Tuesday. By Wednesday the high pressure axis will shift, placing the local waters on the western periphery of the high and resulting in more south to southeasterly winds through the end of the week. Rain chances will gradually increase again as deeper moisture returns to the area Thursday through Saturday. Seas should settle into the 1 to 2 foot range by late Monday, persisting through at least Thursday, with a slight increase across the outer waters late in the work week. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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