Southwest Pass of the Mississippi River to Port Fourchon, LA 20 - 60 NM Marine Forecast
| This Afternoon...Northeast Winds Around 20 Knots With Gusts Up To 25 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 5 Feet At 6 Seconds. A Chance Of Showers. |
| Tonight...Northeast Winds Around 20 Knots With Gusts Up To 25 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast 5 Feet At 6 Seconds. |
| Friday...Northeast Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 6 To 8 Feet, Occasionally To 10 Feet. Wave Detail: Northeast 7 Feet At 7 Seconds. |
| Friday Night...Northeast Winds 20 To 25 Knots With Gusts Up To 30 Knots. Seas 6 To 8 Feet, Occasionally To 10 Feet. Wave Detail: Northeast 8 Feet At 8 Seconds. A Slight Chance Of Showers In The Evening. |
| Saturday...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 8 Seconds. |
| Saturday Night...Northeast Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 8 Seconds. |
| Sunday...Northeast Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: East 3 Feet At 7 Seconds. |
| Sunday Night...East Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: East 2 Feet At 6 Seconds. |
| Monday...East Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: East 2 Feet At 5 Seconds. |
| Monday Night...East Winds Around 10 Knots. Seas Around 2 Feet. Wave Detail: East 2 Feet At 4 Seconds. |
| Area Forecast Discussion National Weather Service New Orleans LA 132pm CDT Thu Oct 9 2025 .SHORT TERM... (This evening through Friday night) Issued at 130pm CDT Thu Oct 9 2025 An upper level ridge encompasses much of the center of the country with troughing on the east and western sides of it. The CWA (County Warning Area) is right between the center of that ridge axis and trough to the east. A shortwave embedded within the eastern trough will push southeastward into the far southeastern US near the Atlantic coast over the next couple days. This will bring a nice drop in temps and humidity to the region with lows and highs slightly below normal. Not a drop of rain during this timeframe which is nice for those who recently had 5-10" of rain but unfortunate for other portions of the local area that have been seeing much lower rain amounts recently. Long Term (Saturday through Wednesday night) Issued at 130pm CDT Thu Oct 9 2025 The forecast through this weekend is generally the same. An upper low rotating eastward around the northern periphery of the ridge will track southeastward across the Great Lakes. This will help keep the current shortwave near Florida in place while it deepens slightly. What that'll do locally is maintain those fall-like temps and keep moisture levels down. Going into next week, we start to lose those cooler temps. Both upper lows situated to the east will shift into the western Atlantic. This will allow for the upper ridge axis centered between the Rockies and the Mississippi River Valley to move eastward, right over the CWA by mid week. In response to those increasing 500mb heights, temps will moderate around 3 to 5 degrees. That puts highs into the mid to maybe upper 80s. This overarching pattern will carry through the remainder of the week. Marine Issued at 130pm CDT Thu Oct 9 2025 A cold front moved into the coastal waters last night and surface high pressure is quickly building in behind it. The pressure gradient will tighten across the coastal waters as weak persistent low pressure over the southeastern Gulf and large area of high pressure to the north and northeast dominate the region over the next few days. Winds have weakened a fair amount this morning in response to slight weakening in the pressure gradient as a shortwave moving southeastward through the parent upper level trough approaches the base of this feature. Wind will begin to increase once again this evening with strong northeast winds continuing through Saturday morning as the base of the trough digs farther southeast. Winds will generally be around 15 to 20 kts with frequent gusts above 20 kts. An Exercise Caution headline was added to fill the gap between last night's and tonight's Small Craft Advisories. This upcoming SCY will continue through Saturday morning for all of the waters again. Winds will finally relax during the day Saturday as high pressure builds in more. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...Small Craft Advisory from 10pm this evening to 10am CDT Saturday for GMZ530-532-534-536-538-550-552-555-557-570-572- 575-577. MS...None. GM...Small Craft Advisory from 10pm this evening to 10am CDT Saturday for GMZ532-534-536-538-550-552-555-557-570-572-575- 577. |
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