Port Fourchon, LA to Lower Atchafalaya River, LA out 20 - 60 NM Marine Forecast
| Today...South Winds Around 15 Knots With Gusts Up To 20 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 5 Feet At 7 Seconds. A Chance Of Showers And Thunderstorms. |
| Tonight...South Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 5 Feet At 7 Seconds. A Slight Chance Of Thunderstorms. A Chance Of Showers, Mainly In The Evening. |
| Saturday...Southwest Winds 10 To 15 Knots, Becoming Northwest 15 To 20 Knots In The Afternoon. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 4 Feet At 7 Seconds And Northwest 2 Feet At 3 Seconds. Showers With A Chance Of Thunderstorms. |
| Saturday Night...North Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet, Building To 7 To 9 Feet, Occasionally To 11 Feet After Midnight. Wave Detail: Northwest 5 Feet At 6 Seconds And Southeast 4 Feet At 7 Seconds, Becoming North 7 Feet At 7 Seconds And Southeast 3 Feet At 7 Seconds. A Chance Of Showers, Mainly In The Evening. |
| Sunday...North Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 7 To 9 Feet, Occasionally To 11 Feet, Subsiding To 5 To 8 Feet, Occasionally To 10 Feet In The Afternoon. Wave Detail: North 8 Feet At 7 Seconds And Southeast 2 Feet At 7 Seconds, Becoming North 8 Feet At 7 Seconds And Southeast 1 Foot At 7 Seconds. |
| Sunday Night...Northeast Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: North 7 Feet At 6 Seconds And Southeast 1 Foot At 7 Seconds. |
| Monday...Northeast Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots In The Afternoon. Seas 4 To 6 Feet, Occasionally To 8 Feet, Subsiding To 3 To 4 Feet, Occasionally To 5 Feet In The Afternoon. Wave Detail: Northeast 6 Feet At 6 Seconds, Becoming Northeast 4 Feet At 7 Seconds. |
| Monday Night...Northeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 3 Feet At 7 Seconds. |
| Tuesday...Northeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: East 2 Feet At 6 Seconds. A Slight Chance Of Showers In The Afternoon. |
| Tuesday Night...Northeast Winds 5 To 10 Knots, Becoming West After Midnight. Seas Around 2 Feet. Wave Detail: West 2 Feet At 3 Seconds And East 2 Feet At 5 Seconds. A Chance Of Showers. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 437am CST Fri Jan 9 2026 .SHORT TERM... (This evening through Friday night) Issued at 545pm CST Thu Jan 8 2026 What a difference 24hrs makes. The initial front is now slowing to a stall tonight from SE Oklahoma to just south of Eagle Pass, TX. If you are looking for a wind shift, you won't find it but the dew pt drop of 20F from 60F to 40F over a distance of about 50 miles gives it away. This is where the sh/ts are developing and moving NE along it. The wind shift will catch up with it later tonight though. This front should stall from near Shreveport to Lerado Tx by daylight Fri. This is roughly 150 miles farther east than 24 hrs ago. Therefore, all other synoptic features will also be found farther east. The 850mb prefrontal trough that was supposed to be over central Louisiana is now expected to stall over our area Fri morning. This prefrontal trough is already starting to set up tonight in Louisiana. Storm cells will continue to develop over much of the state through tonight while the storms along the frontal boundary weaken. A few of these cells could play nasty tonight/morning along and north of a line from McComb to Baton Rouge but there is no indication that it would be more than one or two that become marginally severe. Instability then slowly builds across the whole area starting around daylight Fri and completes by noon Fri. The initial convective band of sh/ts moves north just after midnight while new storms begin to form and flow NE along the stalled perstitant prefrontal boundary during the morning hours Fri. There is still no strong overturn and lift through H7 through much of the morning hours with the exception of near Wilkinson Co. But this changes quickly as we approach noon Fri. As the front and upper trough begins to introduce better severe weather values, this line should start to brecome active as we approach noon or shortly after. The prefrontal trough will move to a location between BTR and MSY when it begins to light up and this is where the first issue with severe weather will be found. The storms will be heavy enough to prime this area with enough rainfall to cause some flooding, but as the storms continue to develop and move over the same places, there could be several spots that flood. Some of the severe weather variables weaken by sundown, but the line will remain producing rainfall over much of these same places transitioning this from a sever storms and flooding to mostly flooding situation. A flood watch is already in place and it is placed very strategically. This will remain as is. Long Term (Saturday through Wednesday night) Issued at 545pm CST Thu Jan 8 2026 The front enters the NW portion of the area around daylight Sat ending the flooding and storm threat as it moves east. The front should be east of the area by early Sat evening. Cold dry air will settle in after frontal passage bringing temps into the 40s Sat night with winds still enough to keep it from freezing, but this won't be the case Sunday night. Temps will refuse to get out of the 50s Sunday then fall to around 30F north and 40F south for Sunday night. Another cool day on Monday and maybe near freezing for some of the northern most areas Monday night. Then a slow warming trend begins for Tuesday through the remainder of the week. Marine Issued at 545pm CST Thu Jan 8 2026 Fog will be able to reduce visibility for some coastal waters this morning but should remain greater than 1SM. The winds are increasing due to the high pressure that is dominating the Gulf sliding northeast. Moderate onshore flow will continue through tonight until a cold front moves through Saturday with a window of strong offshore winds. Because of the increase in winds, an SCS was included for all of the waters for now until Saturday morning. Today and tonight into Saturday will have the greatest potential for rain with the best chance of thunderstorms some likely strong tonight and early Saturday. With days of onshore flow prior to the cold front, we will have a well set up fetch out of the south. With winds quickly veering around to the north-northwest immediately behind the cold front there will be a window of what is called confused seas. The greatest potential appears to be in the outer waters (20-60nm) and west of the mouth of the MS River. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...Flood Watch through Saturday morning for LAZ036-037-039-046>048- 056>060-064-065-071-076>090. GM...None. MS...Flood Watch through Saturday morning for MSZ069>071-077-083-086. GM...None. |
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