Laplace, Louisianna 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

923
FXUS64 KLIX 231824
AFDLIX

Area Forecast Discussion
National Weather Service New Orleans LA
1224 PM CST Tue Dec 23 2025

...NEW SHORT TERM, LONG TERM, AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1222 PM CST Tue Dec 23 2025

 - Widespread dense fog is expected tonight and on Christmas Eve
   night. Commuters and holiday travelers are urged to allow extra
   time to their destinations. With local bonfires planned
   Christmas Eve night there is a chance that very localized super
   fog could develop where those bonfires reside.

 - 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...
(This afternoon through Wednesday)
Issued at 1222 PM CST Tue Dec 23 2025

Not to sound like a broken record, however, the same story
different day (which usually is more of a summertime thing)
cliche can be used here. Upper level ridging has developed over
the region with a 590dam H5 ridge over the region helping promote
a warmer than average temperatures across the region. At the
surface, light easterly or southeasterly winds continue to bring
in slightly higher dewpoints allowing for marine fog to develop
and slowly move inland overnight. Speaking of fog, tonight will
be pretty much a slam dunk for fog across the region with the
stagnant low level flow inland helping radiational fog to form and
right along the adjacent coasts some advection fog may drift in
from the local waters. Continued the dense fog advisory through
tonight and into tomorrow with no changes since the last updated
package early this morning. Otherwise, Christmas Eve looks to
remain well above average with only the immediate MS Gulf Coast
being a touch cooler given the cooler waters over the MS Sound and
a slight onshore flow. (Frye)

&&

.LONG TERM...
(Wednesday night through Monday)
Issued at 1222 PM CST Tue Dec 23 2025

Going into late week, the pattern doesn`t change at least
immediately. Upper ridge still resides over the region. Surface
high still lingering over the northeast Gulf. However, surface
flow will eventually start to veer to a more southerly or
southwesterly direction. Up until this point, fog is a solid bet
across the region. However, this wind shift adds a bit more
uncertainty in terms of fog probs going into the weekend. Still
think some advection fog will be possible as continued moist/warm
air moves over a cold surface of water. However, the inland extent
or development of radiational flow is in question with the flow
gradually increasing.

In terms of the synoptics some changes do take place in the upper
levels as the ridge begins to flatten. At that point later into
the weekend, eyes begin to shift upstream as a broad scale trough
begins to amplify over the central and eastern US. This parent
trough will send a cold front southward toward our region. Along
and head of the front will be our next potential for rainfall.
Globals vary in terms of strength and timing as well as overall
QPF so there is still some time to watch and iron out the exact
details. However, it`s becoming increasingly likely that cooler
weather is on the way for the last few days of the calendar year.
(Frye)


&&

.AVIATION...
(18Z TAFS)
Issued at 1222 PM CST Tue Dec 23 2025

Sky conditions have mostly cleared this afternoon with VFR
conditions across the board. This will continue into the early
evening, however, additional VIS/CIG reductions are expected for
all local terminals overnight tonight and through much of
Wednesday morning. IFR or lower conditions are highly likely
during this time. Eventually, toward the end of the cycle
conditions should begin to improve. As for winds, generally east
at or less than 10 knots. (Frye)

&&

.MARINE...
Issued at 1222 PM CST Tue Dec 23 2025

As we continue into the week, a strong dome of high pressure
dominates the region leading to easterly winds at 5-10 kt. There
is also a signal for fog through the week and there will likely be
additional marine dense fog advisories, especially right along
the coast. The next front is due into the region early next week.
Look for winds to be on the increase very late in the period with
this feature. (Frye)

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  57  74  55  74 /   0   0   0   0
BTR  58  77  56  76 /   0   0   0   0
ASD  55  73  53  72 /   0   0   0   0
MSY  60  73  58  73 /   0   0   0   0
GPT  57  72  54  70 /   0   0   0   0
PQL  55  74  52  72 /   0   0   0   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Dense Fog Advisory from 10 PM this evening to 11 AM CST
     Wednesday for LAZ034>037-039-046>048-056>060-064>071-
     076>090.

GM...Dense Fog Advisory from 6 PM this evening to 10 AM CST Thursday
     for GMZ530-550-552-555-557.

     Dense Fog Advisory from 6 PM this evening to 6 PM CST Thursday
     for GMZ532-534-536-538.

MS...Dense Fog Advisory from 10 PM this evening to 11 AM CST
     Wednesday for MSZ068>071-077-083>088.

GM...Dense Fog Advisory from 6 PM this evening to 10 AM CST Thursday
     for GMZ550-552-555-557.

     Dense Fog Advisory from 6 PM this evening to 6 PM CST Thursday
     for GMZ534-536-538.

&&

$$

SHORT TERM...RDF
LONG TERM....RDF
AVIATION...RDF
MARINE...RDF