477 FXUS64 KLIX 171925 AFDLIXArea Forecast Discussion National Weather Service New Orleans LA 225 PM CDT Wed Sep 17 2025
...New SHORT TERM, LONG TERM, AVIATION, MARINE...
.SHORT TERM... (This evening through Thursday night) Issued at 201 PM CDT Wed Sep 17 2025
An upper level ridge centered along to just east of the Appalachian Mountains is lifting northeastward. In doing so, that will allow at least some weak ridging to build along the northern Gulf Coast. PW`s been up and down around 1.5" the last few days which has allowed for at least some convection to develop. Latest radar shows that`s once again the case where storms have begun to develop along a line from roughly Baton Rouge to McComb. Satellite loop suggest moisture convergence was greatest in this region and as soon as the seabreeze boundary reached that area, storms developed from that lift.
For the rest of this week though, drier pattern with minimal rain chances can generally be expected. Hard to say no rain chances explicitly after watching a cell this past weekend drop 1" of rain in 30 minutes near Slidell in a ~1.25" PW environment. Regardless, minimally impactful weather expected the rest of the week with temps running slightly above normal.
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.LONG TERM... (Friday through Tuesday night) Issued at 201 PM CDT Wed Sep 17 2025
Not really looking at any appreciable changes through this upcoming weekend. Although the weak upper level ridge fades, so does weak upper trough to the northwest. Its not until late the forecast, next week, that the pattern changes locally. Global models suggest a deeper trough diving down into the Central Plains. In doing so, Gulf moisture is drawn northward. This, combined with still strong daytime heating, would be the main driver to increased rain chances.
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.AVIATION... (18Z TAFS) Issued at 201 PM CDT Wed Sep 17 2025 A dry airmass over the region will keep prevailing VFR conditions at all of the terminals through the afternoon hours. Visible satellite does show scattered CU development but ceilings should be above 3kft. There is a low risk of additional thunderstorm activity forming, especially near BTR and MCB where both recent radar and sate imagery show moisture convergence zone. However, the probability of a direct impact on a terminal is too low to include in the forecast.
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.MARINE... Issued at 201 PM CDT Wed Sep 17 2025 Generally benign conditions will persist across the waters through the rest of this week as surface ridge remains either overhead or just to the northeast of the local area. That placement of the ridge in relation to the nearby coastal waters will result in generally light to moderate east to southeasterly winds. Expect to also have directional changes due to sea/lake/land breeze influences across the near shore waters, sounds, and tidal lakes. Waves and seas will generally be in the 1-2 ft for nearshore and protected waters with 2- 4 ft in the outer waters.
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.PRELIMINARY POINT TEMPS/POPS... MCB 66 91 66 91 / 10 0 0 0 BTR 69 92 67 92 / 10 0 0 10 ASD 66 90 66 90 / 0 0 0 0 MSY 73 92 74 92 / 0 0 0 10 GPT 69 89 68 90 / 0 0 0 0 PQL 65 91 66 92 / 0 0 0 0
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.LIX WATCHES/WARNINGS/ADVISORIES... LA...None. GM...None. MS...None. GM...None. &&
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SHORT TERM...ME LONG TERM....ME AVIATION...ME MARINE...ME
NWS LIX Office Area Forecast Discussion