Southwest Pass of the Mississippi River to Port Fourchon, LA 20 - 60 NM Marine Forecast
| Tonight...Southeast Winds 5 To 10 Knots, Becoming East Late. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 6 Seconds. A Chance Of Thunderstorms. A Chance Of Showers Until Early Morning, Then Showers Likely Late. |
| Monday...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: East 2 Feet At 5 Seconds. Showers Likely With A Chance Of Thunderstorms. |
| Monday Night...Northeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 2 Feet At 4 Seconds And Southeast 2 Feet At 6 Seconds. Showers. A Chance Of Thunderstorms, Mainly In The Evening. |
| Tuesday...Northeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 3 Feet. Wave Detail: East 2 Feet At 5 Seconds. Showers With A Chance Of Thunderstorms. |
| Tuesday Night...Northeast Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 5 Feet At 6 Seconds. A Slight Chance Of Thunderstorms. Showers. |
| Wednesday...Northeast Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Northeast 7 Feet At 7 Seconds. Showers With A Chance Of Thunderstorms. |
| Wednesday Night...East Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 7 To 9 Feet, Occasionally To 11 Feet. Wave Detail: Northeast 9 Feet At 7 Seconds. Showers Likely. A Slight Chance Of Thunderstorms In The Evening, Then A Chance Of Thunderstorms After Midnight. |
| Thursday...East Winds 20 To 25 Knots. Seas 7 To 8 Feet, Occasionally To 10 Feet, Building To 8 To 10 Feet, Occasionally To 13 Feet In The Afternoon. Wave Detail: East 8 Feet At 7 Seconds, Becoming East 9 Feet At 8 Seconds. Showers With A Chance Of Thunderstorms. |
| Thursday Night...East Winds 25 To 30 Knots. Seas 9 To 11 Feet, Occasionally To 14 Feet. Wave Detail: East 11 Feet At 8 Seconds. Showers With A Chance Of Thunderstorms. |
| Friday...East Winds 25 To 30 Knots. Seas 9 To 11 Feet, Occasionally To 14 Feet. Wave Detail: East 10 Feet At 8 Seconds. Showers With A Chance Of Thunderstorms. |
| Friday Night...Southeast Winds 30 To 35 Knots. Seas 11 To 14 Feet, Occasionally To 18 Feet, Building To 13 To 15 Feet, Occasionally To 19 Feet After Midnight. Showers With A Chance Of Thunderstorms. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 648pm CDT Sunday Oct 4 2026 .SHORT TERM... (Now through Wednesday) Issued at 1126am CDT Sunday Oct 4 2026 We are finally getting out of the heavy rains. Definitely still have a lot of the area covered with rain and are still being squeezed by the front hanging just to our north. That front is moving south only slowly and it will be late tonight or early tomorrow before it makes it to the coast and into the Gulf. With the general SW-NE orientation of the front, we are still expecting the longest duration and heaviest rains in the MS coastal counties. We have a Flood Watch running until midnight for the half-CWA (County Warning Area) east of I-55. Once the front moves on into the Gulf we can expect to see some drier air and lack of rain, especially in the northern half of the area. Nearer the front, we still expect Probability of Precipitation in the 30-50% range and depending on how far the front pushes south those rain chances may exist just onshore along the coastal areas. Unfortunately, the lack of rain may also carry slightly warmer daytime highs and we see some near-90 temps by mid-week. Long Term (Wednesday night through Saturday) Issued at 1126am CDT Sunday Oct 4 2026 Troughing will continue along the northern Gulf Coast and by Wednesday night the associated frontal boundary will be well offshore over the Gulf. A stronger shortwave over west Texas into Thursday should entrain some deeper tropical moisture from the southwest Gulf that will reach the local area by late Friday. This blast of tropical moisture, unfortunately, looks to produce another wet weekend across the area next weekend. While most or all of the area should be dry Wednesday and Thursday, rain chances will increase for Friday and Saturday as precipitable water values increase again to nearly daily max values (2.3 inches). Global models have some disagreement about the details this far out, but there's enough similarity to not back off the Probability of Precipitation in the forecast. Midweek temperatures have trended upward a bit and won't rule out a 90 degree high or two on Thursday. A bit of a cool-off comes at the end of the week with the presence of clouds and precipitation that may trend weekend temperatures down a bit from previous runs, closer to 80 than 90. Marine Issued at 1126am CDT Sunday Oct 4 2026 The frontal system currently accentuating the rain in the area will continue to drop southward and winds will briefly relax to 10 knots or less later today as a front stalls along the coast. This front is expected to then slowly push through the waters on Monday and Tuesday. Winds will turn northeasterly behind the front and increase to 15 to 20 knots as drier air advects over the warm waters. Another low will form along the front by Wednesday, and this should increase winds in small craft advisory range of 20 to 25 knots through the end of the week. Seas will also increase to 5 to 7 feet by Wednesday over the open waters well offshore and remain at those levels through the end of the week. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...Flood Watch until midnight CDT tonight for LAZ039-058-064-070- 071-076>082-087-089>093-098>100. GM...None. MS...Flood Watch until midnight CDT tonight for MSZ070-071-077- 083>088. GM...None. |
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