textproduct: New Orleans/Baton Rouge

KEY MESSAGES

Updated at 1035 AM CST Sat Dec 27 2025

- Areas of dense fog are likely again tonight. 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 during the overnight and morning hours. - Above average temperatures continue Sunday with daytime highs in the 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 Sunday night through Monday with a cool down expected behind the front. Some showers and maybe a thunderstorm with it, but severe storms are not expected.

- Cold weather advisories may be needed Tuesday as wind chill temperatures will be between 15-25 degrees for most locations.

SHORT TERM

(This afternoon through Sunday) Issued at 1035 AM CST Sat Dec 27 2025

Tonight through Sunday night, high pressure weakens over the area. Southerly onshore flow continues to advect warm and humid air into the region. High temperatures will be in the upper 70s Sunday. Some scattered light showers could be possible Sunday afternoon and early evening with the daytime heating, looking at the models. There will be very little, if any, rainfall total accumulation with these showers. If anything, it would be <0.25 inches total for Sunday afternoon showers. MSW

LONG TERM

(Sunday night through Friday) Issued at 1035 AM CST Sat Dec 27 2025

A weak frontal system moves through the area on Sunday overnight into Monday. Looking at the models, there could be some lighting and gusty winds (30-50mph), but severe weather will not be a concern with this system. Rainfall accumulations will generally be less than an inch, and flash flooding is not a concern either with this system.

On the backside of the front, strong cold air advection as the trough digs a little as it progresses eastward will help to bring quite a cold snap into the region Tuesday through Friday mornings. Conditions will be a bit breezy on Tuesday with wind gusts 20-25mph. This will exacerbate the cold temperatures and the cold risk to people. Lows on Tuesday morning will be in the upper 20s and low 30s, but the wind chill on Tuesday will be around 20 degrees or lower for areas north of the I-10/12 corridor. South of the I-10/12 corridor, wind chill temperatures will be in the mid 20s. Therefore, it is possible that cold weather advisories will be needed for Tuesday.

Wednesday, New Year's Eve, will be the coldest morning of the week. The lows on Wednesday will be in the mid 20s for areas north of I-10/12 and in the low to mid 30s for areas south of I-10/12. The feels like temperatures will be similar to the air temperature for Wednesday, given the calmer winds. The lows on New Year's Day will be around freezing for areas along and north of the I-10/12 corridor and in the mid to upper 30s for areas south of the I-10/12 corridor. We start to warm up on Thursday through the weekend. MSW

AVIATION

(18Z TAFS) Issued at 1035 AM CST Sat Dec 27 2025

VFR conditions prevail at all area airports. Conditions at all airports will drop to LIFR due to dense fog late tonight through Sunday morning. Conditions will improve slowly by midmorning. MSW

MARINE

Issued at 1035 AM CST Sat Dec 27 2025

No real relief for fog over coastal areas again tonight/Sun morning with the fog remaining in some areas through much of the day. A cold front should enter the northern gulf Monday morning shortly after daylight. This will definitely move the fog issue away. Look for winds to rapidly increase from the north as the front moves through Monday and start easing late Tue into Wed. Strongest wind speeds should be Monday night as sustained could reach 25 to 30kt with gusts to gale force.

PRELIMINARY POINT TEMPS/POPS

MCB 60 77 46 52 / 0 10 80 10 BTR 61 80 49 57 / 0 20 60 10 ASD 58 77 49 60 / 0 10 60 20 MSY 63 79 54 62 / 0 20 40 20 GPT 59 73 52 65 / 0 10 60 30 PQL 57 75 52 64 / 0 0 50 30

LIX WATCHES/WARNINGS/ADVISORIES

LA...Dense Fog Advisory from midnight tonight to 10 AM CST Sunday for LAZ056>060-064>070-076>078-080-082-084>090.

GM...Dense Fog Advisory until 6 PM CST this evening for GMZ530-532- 534-536-538-555.

Dense Fog Advisory from midnight tonight to 10 AM CST Sunday for GMZ530-532-534-536-538-550-552-555.

MS...Dense Fog Advisory from midnight tonight to 10 AM CST Sunday for MSZ086>088.

GM...Dense Fog Advisory until 6 PM CST this evening for GMZ532-534- 536-538-555.

Dense Fog Advisory from midnight tonight to 10 AM CST Sunday for GMZ532-534-536-538-550-552-555.