Chandeleur Sound Marine Forecast
| This Afternoon...Southwest Winds Around 5 Knots. Waves 1 Foot Or Less. Widespread Fog Late. |
| Tonight...Southwest Winds 5 To 10 Knots, Becoming North After Midnight. Waves 1 Foot Or Less, Then Around 2 Feet After Midnight. |
| Sunday...North Winds 5 To 10 Knots. Waves Around 2 Feet In The Morning, Then 1 Foot Or Less. |
| Sunday Night...Northeast Winds Around 5 Knots, Becoming East After Midnight. Waves 1 Foot Or Less. |
| Monday...Southeast Winds 5 To 10 Knots. Waves Around 2 Feet. |
| Monday Night...South Winds 10 To 15 Knots With Gusts Up To 20 Knots. Waves 2 To 3 Feet. A Slight Chance Of Showers. |
| Tuesday...South Winds 10 To 15 Knots. Waves 2 To 3 Feet. A Chance Of Showers. A Slight Chance Of Thunderstorms In The Afternoon. |
| Tuesday Night...South Winds 5 To 10 Knots, Becoming West After Midnight. Waves Around 2 Feet. Showers Likely With A Slight Chance Of Thunderstorms In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight. |
| Wednesday...North Winds 10 To 15 Knots. Waves 2 To 3 Feet. A Chance Of Showers With A Slight Chance Of Thunderstorms In The Morning, Then A Slight Chance Of Showers In The Afternoon. |
| Wednesday Night...North Winds 20 To 25 Knots. Waves 4 To 5 Feet. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 539am CST Sat Nov 22 2025 .SHORT TERM... (Tonight through Saturday night) Issued at 1045pm CST Thu Nov 20 2025 The main story of the immediate short term is the potential for some light to moderate showers across the area on Friday. This comes as we see our ridge breaks down a bit and a surface low slides across the Central Plains through the day. We get a LLJ pushing up into our area from the Gulf sometime mid Friday morning that will help support our chances for showers. While the conditions don't look to support any organized convection, a few embedded thunderstorms are definitely in play. The areas that would have the best chance for this would be areas north of the I-10/12 corridor and towards the afternoon hours. Any rain or storms that do develop look to end by the evening hours Friday. In terms of temperatures, expect Friday and Saturday to continue the warm trend with highs well above the climate normals. Fog potential does not look to be very high for overnight into Friday morning, with low probabilities across the board, but don't want to completely rule out some light fog in some areas. Saturday morning however could see the return of fog concerns and there are actually already several models indicating this. So that will be something to watch tomorrow if a Dense Fog Advisory will be needed. Long Term (Sunday night through Thursday night) Issued at 1045pm CST Thu Nov 20 2025 The start to the long term looks to be quiet as surface high pressure sets up to our north and holds all of Sunday. On top of the high pressure at the surface, in the upper levels a shortwave trough digging down over the desert SW will help strengthen the riding over our area. Speaking of this trough, that will be our next potential weather maker as it slides up over the Central Plains and into the Midwest through mid week. At the surface we yet again see a low pressure system that will have a subsequent front with it. As this system makes its way into our area moisture will pool into the areas thanks to onshore flow which will help PoPs start to increase by Monday evening, peaking during the day on Tuesday but lingering some low rain chances throughout Wednesday. This would be welcomed rain as a good chunk of the area still sits in a D1 (Moderate) drought. If this system were to play out as currently shown in the models, it would leave us with a dry Thanksgiving day with cooler temperatures. Given it is a week out, I would not 100% buy into this just yet. In terms of temperatures, while Sunday would see a slight cool down Monday and Tuesday look to be back to a good 10 degrees above average for most areas. If our front is able to push through here, Wednesday highs would be a little closer to climate normals and Thursday would see a pretty decent cooldown. Now there is some questions with this system as every week the last few weeks models 6-7 days out have shown a deepening trough shooting out of the western U.S and breaking our pattern. However, up to this point each one has weakened within a couple days of getting here, leaving us with little rain chances and not a big change in temperature. So, will this system finally be the one to actually make it here without weakening? Time will tell. It is something to be monitored over the coming days. Marine Issued at 1045pm CST Thu Nov 20 2025 Southwest waters have become fairly gusty this evening, with gusts up above 20kts. For this reason, a short lived Small Craft Advisory is in effect for Southwest waters through Friday morning. A low pressure system will pass well north of the region Friday and Friday night. This will try to push a cold front into the area but the front will likely stall along or north of the coast. Scattered showers and a low threat of thunderstorm will accompany this weakening front on Friday and Friday evening. Winds will calm over the weekend to less than 10 knots as a high pressure system over the eastern Gulf becomes more dominant over the waters. However, another system will once again push winds and seas higher on Monday and Tuesday. Southerly flow should increase back into the 15 to 20 knot range over this period. Another round of showers and a few thunderstorms will also develop over the waters as this next storm system moves through. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...Small Craft Advisory until 6am CST early this morning for GMZ570-572. MS...None. GM...Small Craft Advisory until 6am CST early this morning for GMZ572. |
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