Southwest Pass of the Mississippi River to Port Fourchon, LA 20 - 60 NM Marine Forecast
| Overnight...Southeast Winds 10 To 15 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 4 Seconds. |
| Sunday...Southeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 5 Seconds. |
| Sunday Night...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 5 Seconds. |
| Monday...South Winds Around 5 Knots, Becoming Northwest In The Afternoon. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. A Slight Chance Of Showers In The Morning. |
| Monday Night...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 8 Seconds. |
| Tuesday...East Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 7 Seconds. |
| Tuesday Night...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 7 Seconds. |
| Wednesday...Southeast Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 6 Seconds. A Slight Chance Of Showers. |
| Wednesday Night...Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 5 Seconds. A Slight Chance Of Showers After Midnight. |
| Thursday...East Winds 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 5 Seconds. A Slight Chance Of Showers. |
| Thursday Night...East Winds Around 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. A Slight Chance Of Showers. |
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Area Forecast Discussion National Weather Service New Orleans LA 1142pm CST Sat Jan 25 2025 Issued at 835pm CST Sat Jan 25 2025 Clouds have moved into the area rather quickly this evening. In most areas, overnight low temperatures may have already occurred, with the potential for temperatures to rise somewhat after midnight. Have updated grids and ZFP to indicate the more extensive cloud cover overnight into Sunday morning. .SHORT TERM... (This evening through Monday night) Issued at 105pm CST Sat Jan 25 2025 High pressure will shift farther east of the local area tonight with onshore flow resulting in a continued warming trend. For the first time since last Monday, we have no freezing temperatures in the forecast! A weak cold front will move through the local area Sunday night into Monday in response to a fast-moving shortwave embedded withing the overall troughiness dominating the eastern CONUS. While moisture will be fairly limited, the forcing from the front should result in scattered to numerous showers Sunday night. Instability will be rather limited, but can't rule out a few thunderstorms here and there, so will continue to carry a slight chance of thunder as the front moves through. Overall rainfall totals should generally be one half inch or less. However, anywhere thunderstorms do occur could see locally higher totals with ensemble guidance indicating about a 10% chance of reaching 1" of rain for all points roughly north of a line from Morgan City to Covington to Saucier. Additionally, even rainfall rates of around 0.5" per hour could result in enhanced runoff owing to the hard ground after a week of morning temperatures below freezing. Given the hard ground, especially across northern portions of the forecast area, WPC continues to highlight areas generally northwest of a line from Baton Rouge to McComb with a marginal risk of flash flooding. Most likely impacts would be localized street flooding in areas where runoff from even modest rainfall rates may overwhelm local drainage capacity. Rain quickly moves out of the area by Monday afternoon as high pressure builds into the area behind the weak cold front. Long Term (Tuesday through Friday night) Issued at 105pm CST Sat Jan 25 2025 Tuesday will be fairly quiet as Monday's front presses into the Gulf and transient high pressure builds across the local area. The surface high quickly shifts east of the local area by Tuesday night, with return flow setting in. Onshore winds will result in an increase in moisture, and it still looks like dense fog may be a concern Tuesday night as warmer and more humid air advects northward over cooler nearshore waters. A weak front will slide through the local area late Wednesday as a fast-moving upper level disturbance swings through the middle Mississippi Valley around larger-scale troughing over the eastern CONUS. This will result in isolated to scattered showers with the best chances across northern portions of the local forecast area. While a few thunderstorms can't be ruled out, instability looks meager and thus will only carry a slight chance of thunder across far northern areas where lift will be a little stronger due to proximity to the main disturbance. By Thursday and Friday a cutoff low located over the southwestern CONUS will finally begin to lift northeastward. As the upper low deepens and moves northeastward, a surface low is forecast to develop over northern Mexico by Thursday, forcing a warm front into the local area Friday night into Saturday. Ahead of the low, broad ascent across the old frontal boundary will result in isolated to scattered showers, but once again instability as a whole remains meager at best and thunderstorms currently look unlikely. The better chance of thunderstorms looks to be just beyond the current forecast period going into Saturday as the trough axis associated with the upper low takes on a negative tilt and the surface low and associated fronts move into the local area. Will need to keep an eye on trends and whether there will be enough instability to support more scattered or widespread thunderstorms as the next cold front sweeps through the local area Friday night into Saturday. Marine Issued at 105pm CST Sat Jan 25 2025 Expect generally benign conditions to persist through the first part of the week with light onshore flow. The onshore winds will gradually bring moisture into the area, and there is potential for dense fog development by Tuesday night as warmer and more humid air advects northward across cooler nearshore waters. A weak front will pass into the coastal waters Wednesday night into Thursday with winds shifting to the northeast/east. The tighter pressure gradient will also result in stronger winds and exercise caution headlines appear likely by late Thursday. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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