textproduct: New Orleans/Baton Rouge

KEY MESSAGES

Updated at 701 PM CST Wed Dec 24 2025

- Widespread dense fog is expected again tonight and Christmas morning. Commuters and holiday travelers are urged to allow extra time to their destinations. The environment is very conducive to super fog formation near and downwind of fires. - Above average temperatures continue with daytime highs mostly in the upper 70s and quite possibly reaching the low 80s with overnight lows around 60 degrees.

- Next cold front and chance of rain will be due into the region early next week with a brief cool down expected behind the front.

SHORT TERM

(Tonight through Friday night) Issued at 701 PM CST Wed Dec 24 2025

Not much change has taken place as far as the environment is concerned. The dew pt has not even changed one degree for fog production which remains at 63-64F. The wet bulb cooling is still impressive when compared to yesterday's and almost exactly equal(yesterday's sounding showed a 10C cooling in 1540ft today's shows a 6C cooling in 900ft). This comes to 1C/154ft for yesterday compared to 1C/150ft for today. Yelp, pretty much exactly the same and still strong. This same scenario remains through at least Friday night. But there could be some subtle changes, not in getting fog but how it forms. It could become more advective instead of conglomerate by Friday morning and again Friday night.

LONG TERM

(Saturday night through Wednesday night) Issued at 701 PM CST Wed Dec 24 2025

A cold front will move through at the beginning of the week flushing the fog away. There will be some showers with this but they don't look to be heavy. There are no moderate or strong chances of storms with this either as most if not all of these will be offshore and also well north of the area. We will need to get closer to this fropa to tell exactly what and where, but this is a first glimpse into what should occur.

AVIATION

(00Z TAFS) Issued at 701 PM CST Wed Dec 24 2025

Cigs and vis will be once again in IFR and LIFR once these conditions set in this morning. Same timing as far as erosion of the fog deck to set VFR. This same scenario occurs again tonight into Fri morning.

MARINE

Issued at 701 PM CST Wed Dec 24 2025

Fog will remain through much of each day and widespread overnight into the end of the week which will likely bring additional marine dense fog advisories, especially right along the coast. This fog may not lift in many areas near the coast, but as land heating gets going, we should see some erosion over water bodies that can move this air over the water. The next front is due into the region early next week. This will definitely move the fog issue away. Look for winds to be on the increase very late in the period with this feature as well which should produce headlines.

PRELIMINARY POINT TEMPS/POPS

MCB 76 56 73 58 / 0 0 0 10 BTR 78 58 76 59 / 0 0 0 10 ASD 74 54 72 55 / 0 0 0 0 MSY 74 59 73 60 / 0 0 0 0 GPT 71 55 70 56 / 0 0 0 0 PQL 75 52 71 53 / 0 0 0 0

LIX WATCHES/WARNINGS/ADVISORIES

LA...Dense Fog Advisory until 10 AM CST Thursday for LAZ034>037-039- 046>048-056>060-064>071-076>090.

GM...Dense Fog Advisory until 10 AM CST Thursday for GMZ530-550-552- 555-557.

Dense Fog Advisory until 6 PM CST Thursday for GMZ532-534-536- 538.

MS...Dense Fog Advisory until 10 AM CST Thursday for MSZ068>071-077- 083>088.

GM...Dense Fog Advisory until 10 AM CST Thursday for GMZ550-552-555- 557.

Dense Fog Advisory until 6 PM CST Thursday for GMZ534-536-538.