Port Fourchon, LA to Lower Atchafalaya River, LA out 20 - 60 NM Marine Forecast
| Rest Of Today...West Winds Around 15 Knots With Gusts Up To 20 Knots. Seas Around 4 Feet, Occasionally To 5 Feet. Wave Detail: West 4 Feet At 5 Seconds And Southeast 1 Foot At 6 Seconds. A Slight Chance Of Thunderstorms. A Chance Of Showers Late This Morning And Early Afternoon, Then A Slight Chance Of Showers Late. |
| Tonight...West Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: West 4 Feet At 6 Seconds And Southeast 1 Foot At 6 Seconds. |
| Tuesday...West Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: West 3 Feet At 5 Seconds And Southeast 1 Foot At 6 Seconds. |
| Tuesday Night...Southwest Winds 10 To 15 Knots, Becoming South 15 To 20 Knots After Midnight. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 4 Feet At 6 Seconds. |
| Wednesday...South Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 5 Feet At 6 Seconds. |
| Wednesday Night...South Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southwest 4 Feet At 6 Seconds. |
| Thursday...South 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: Southwest 4 Feet At 6 Seconds. |
| Thursday Night...South Winds 10 To 15 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 4 Feet At 6 Seconds. |
| Friday...South Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 4 Feet At 6 Seconds. |
| Friday Night...South Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 3 Feet At 6 Seconds. Winds And Seas Higher In And Near Thunderstorms. |
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Area Forecast Discussion National Weather Service New Orleans LA 633am CDT Monday May 12 2025 Long Term (Tuesday night through Sunday) Issued at 305am CDT Monday May 12 2025 Welcome to summer along the Gulf Coast. Ridging moves into the Gulf and southeastern U.S. That'll be the case through at least Friday, and if the GFS (Global Forecast System) is correct, through the entire weekend into early next week. The ECMWF (European Centre for Medium-Range Weather Forecasts) operational run, and around half of its ensemble members, tries to push a cold front toward the area over the weekend. That would increase the chance for showers and storms during the afternoons over the weekend. For now, a compromise solution brings a small chance of showers/storms to the area over the weekend, but that wouldn't be a washout by any means. Forecast soundings indicate upper 80s for highs for most of the area Wednesday, but wouldn't be shocked to see a few spots hit 90. Thursday and Friday are likely to see most or all of the area in the lower 90s, with the possible exception of the immediate coastal areas. That's not far off the "normal" first 90 degree reading, which is May 13th for Baton Rouge, the 17th for Slidell, the 18th for New Orleans International Airport, the 21st for McComb, and the 24th for Gulfport. The GFS solution would keep 90 degree highs in place through the weekend. Overnight lows will be above normal, from the upper 60s to mid 70s for the 2nd half of the week and over the weekend. Heat index values could top out around 100 degrees each day from Thursday onward. This isn't enough to justify Heat Advisories, but as this will be the first extended period of very warm conditions this season, it may take a bit for folks to acclimate to the heat, even those that are used to Gulf Coast summers. Marine Issued at 305am CDT Monday May 12 2025 Westerly winds around 15 knots, or perhaps a bit higher, will necessitate Small Craft Exercise Caution headlines today for much of the open waters. There are likely to be a few additional periods this week where winds increase into the 15-18 knot range, which would necessitate additional headlines. At this time, it doesn't appear conditions will deteriorate enough to justify Small Craft Advisories, though. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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