Southwest Pass of the Mississippi River to Port Fourchon, LA 20 - 60 NM Marine Forecast
| This Afternoon...North Winds 25 To 30 Knots With Gusts Up To 40 Knots. Seas 9 To 11 Feet, Occasionally To 14 Feet, Building To 9 To 13 Feet, Occasionally To 17 Feet. Wave Detail: Northwest 10 Feet At 7 Seconds. |
| Tonight...North Winds 25 To 30 Knots, Diminishing To 20 To 25 Knots After Midnight. Seas 8 To 11 Feet, Occasionally To 14 Feet, Subsiding To 5 To 7 Feet, Occasionally To 9 Feet After Midnight. Wave Detail: Northwest 9 Feet At 7 Seconds, Becoming Northwest 6 Feet At 7 Seconds. |
| Sunday...North Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northwest 3 Feet At 6 Seconds And Northwest 1 Foot At 3 Seconds. |
| Sunday Night...Northwest Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Northwest 2 Feet At 3 Seconds And Northeast 1 Foot At 4 Seconds. |
| Monday...Northwest Winds 5 To 10 Knots. Seas Around 2 Feet In The Morning, Then 1 Foot Or Less. Wave Detail: Northwest 1 Foot At 3 Seconds And Northeast 1 Foot At 5 Seconds, Becoming Northwest 1 Foot At 3 Seconds And Northeast 1 Foot At 4 Seconds. |
| Monday Night...South Winds 5 To 10 Knots. Seas 1 Foot Or Less, Then Around 2 Feet After Midnight. Wave Detail: Southwest 1 Foot At 3 Seconds, Becoming South 1 Foot At 3 Seconds. |
| Tuesday...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: South 2 Feet At 3 Seconds. |
| Tuesday Night...South Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 3 Feet At 4 Seconds. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers After Midnight. |
| Wednesday...West Winds 15 To 20 Knots, Becoming Northwest In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southwest 4 Feet At 5 Seconds. A Slight Chance Of Thunderstorms. Showers Likely, Mainly In The Morning. |
| Wednesday Night...North Winds 25 To 30 Knots. Seas 5 To 8 Feet, Occasionally To 10 Feet, Building To 7 To 9 Feet, Occasionally To 11 Feet After Midnight. Wave Detail: Northwest 6 Feet At 6 Seconds, Becoming Northwest 7 Feet At 7 Seconds. A Slight Chance Of Showers. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 1139am CST Sat Jan 31 2026 .SHORT TERM... (This afternoon through Sunday) Issued at 1031am CST Sat Jan 31 2026 The main story of today is the cold and the winds. In the upper levels we see a positively tilted trough sliding down through the Tennessee valley and eventually off the Southeast coast later today. At the surface a high pressure system over the Southern Plains will gradually move into our area throughout the day today. Before that high pressure gets here, the pressure gradient will cause winds to be rather gusty throughout the day. Gusts from 25-35mph will be common, with a few gust to around 40mph not out of the question. Due to this, a Wind Advisory remains in place through midnight tonight. The winds being so breezy will also cause fairly cool wind chills today. While the afternoon high temperatures should reach above freezing for most, the gusty winds will cause wind chills to barely reach 25 for the entire area. Overnight tonight, low temperatures are expected to drop into the upper teens for northern areas and the low to mid 20s for southern and coastal areas. Wind chills will get as low as the single digits for some northern areas, with most areas around 10-15F. An Extreme Cold Warning is in effect through 9AM Sunday due to these conditions. Long Term (Sunday night through Friday) Issued at 1031am CST Sat Jan 31 2026 Heading into the long term period, we will star off with another chilly night on Sunday though not as bas as Saturday night. With the high pressure system well moved into the area by this timeframe, winds will relax which will help with wind chills not really being an different than the low temperatures. Lows Sunday night into Monday morning are forecast to be in the mid to upper 20s north and the upper 20s to lower 30s south. While last forecast cycle we were hovering right around Cold Weather Advisory criteria, the model trended a bit warmer this run and I would lean closer to that solution, so no cold hazards expected. Monday and Tuesday bring pretty calm weather, with a brief warm up into the low 60s Monday and even the mid to upper 60s on Tuesday. Low temperatures Tuesday morning are forecast to be back up into the 40s for most areas as well. Wednesday brings our next weather system in the form of yet another cold front, though as of right now this one is not looking to be quite as strong. Lows may drop just below freezing for some northern areas, otherwise looking like the mid 30s elsewhere. This one does however look to bring a pretty good chance of rain with it. Probability of Precipitation early Wednesday morning currently forecast to peak at 75-85% for a good portion of the area. Marine Issued at 1031am CST Sat Jan 31 2026 Winds remain elevated out of the north through the day behind yesterdays cold front. High end SCY and Gale conditions will continue for the next 15-20 hrs before high pressure finally builds in Sunday causing winds to quickly relax. High pressure will continue to slowly slide east moving away from the area Monday. This will lead to onshore winds to returning late Monday but the next cold front will already be closing in, moving across the region Wednesday. This front will bring the return of gusty winds mid to late week, up to at least SCY criteria. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...Extreme Cold Warning until 10am CST Sunday for LAZ034>037-039- 046>048-056>060-064>071-076>090. Wind Advisory until midnight CST tonight for LAZ058>060-064>070- 076>078-087>090. GM...Gale Warning until midnight CST tonight for GMZ530-532-534-536- 538-550-552-555-557-570-572-575-577. MS...Extreme Cold Warning until 10am CST Sunday for MSZ068>071-077- 083>088. Wind Advisory until midnight CST tonight for MSZ086>088. GM...Gale Warning until midnight CST tonight for GMZ532-534-536-538- 550-552-555-557-570-572-575-577. |
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