Southwest Pass of the Mississippi River to Port Fourchon Louisiana Marine Forecast
| Tonight...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 7 Seconds. A Chance Of Showers And Thunderstorms Early This Evening. A Slight Chance Of Showers And Thunderstorms Late This Evening And Early Morning, Then A Chance Of Showers And Thunderstorms Late. |
| Wednesday...Southeast Winds 5 To 10 Knots, Increasing To 10 To 15 Knots In The Afternoon. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Chance Of Showers And Thunderstorms. |
| Wednesday Night...Southeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms In The Evening. |
| Thursday...Southeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 8 Seconds. A Chance Of Showers. A Slight Chance Of Thunderstorms In The Morning, Then A Chance Of Thunderstorms In The Afternoon. |
| Thursday Night...Southeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms In The Evening. |
| Friday...Southeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Chance Of Showers And Thunderstorms. |
| Friday Night...Southeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Slight Chance Of Thunderstorms In The Evening. A Slight Chance Of Showers. |
| Saturday...Southeast Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Saturday Night...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 7 Seconds. A Chance Of Showers. A Chance Of Thunderstorms After Midnight. |
| Sunday...Northeast Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 8 Seconds. Showers Likely With A Chance Of Thunderstorms In The Morning, Then A Chance Of Showers With A Slight Chance Of Thunderstorms In The Afternoon. |
| Sunday Night...North Winds 15 To 20 Knots, Becoming Northeast 20 To 25 Knots After Midnight. Seas 2 To 4 Feet, Occasionally To 5 Feet. A Chance Of Showers With A Slight Chance Of Thunderstorms. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion ...UPDATED National Weather Service New Orleans LA 624pm CDT Tuesday Mar 31 2026 .SHORT TERM... (This afternoon through Wednesday) Issued at 1100am CDT Tuesday Mar 31 2026 Tonight through Wednesday night, as we have said for a few days, a pattern of unsettled weather will set up over the area. Scattered thunderstorms will be expected daily through Wednesday, mainly during peak afternoon heating hours. These storms are not expected to be severe. Some lightning will be possible, especially between 3-6pm Wednesday. Temperatures will be mild with highs in the low 80s and humid conditions all week. Lows will be in the upper 60s and low 70s as the week progresses. MSW Long Term (Wednesday night through Monday) Issued at 1100am CDT Tuesday Mar 31 2026 Thursday through the weekend, southwesterly flow will be the primary pattern over the area. A couple of shortwaves will influence the area. The first one will be Thursday afternoon into Friday, which will enhance rain chances. PW values (Precipitable Water values) will be increasing throughout the week with values around 1.5-1.7 inches, which is in the 90th percentile for Storm Prediction Center sounding climatology. So, there will be plenty of moisture to work with in the environment with decent CAPE. As the shortwave moves through, scattered storms will be expected with a few strong to severe storms possible. There are still a lot of uncertainties on the timing of this system, given it is still greater than 4 days out. We will keep monitoring closely as things develop over the next few days. Another shortwave will be moving through the area Saturday night into Sunday. Rain chances will be enhanced as this system moves through as well. This system has the best chance of seeing strong to severe storms, but there are still a lot of model uncertainties. Temperatures will be generally in the mid 80s for highs this weekend, especially Saturday, with lows in the mid to upper 60s and low 70s. Sunday into Monday, we could see cooler temperatures behind the frontal system with highs forecast in the low to mid 70s Sunday and Monday. MSW Marine Issued at 1100am CDT Tuesday Mar 31 2026 A persistent southeast wind around 15 knots and seas of 2 to 4 feet will remain over the coastal waters through Wednesday as a broad surface high over the southeastern states dominates the region. Southeast winds will increase to 15 to 20 knots Thursday as a low pressure system passes well north of the waters. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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