613
FXUS64 KHUN 071713
AFDHUN

Area Forecast Discussion
National Weather Service Huntsville AL
1113 AM CST Sun Dec 7 2025

...New AVIATION...

.KEY MESSAGES...
Updated at 950 AM CST Sun Dec 7 2025

 - Low to medium (30-50%) chances for rain tonight into early
   Monday morning.

 - Subfreezing temperatures return Monday night before a gradual
   warming trend through midweek.

 - Confidence is increasing in the potential of very cold
   conditions by next weekend.


&&

.NEAR TERM...
(Rest of Today and Tonight)
Issued at 950 AM CST Sun Dec 7 2025

Temperatures this morning as of 9am have warmed above freezing
and with visibility also increasing across most of the Tennessee
Valley the Freezing Fog advisory has ended. While there is still a
few spots showing locally dense fog, it is not widespread enough
for an advisory.

Satellite imagery shows a wide swath of low level stratus over
most of northern AL and southern middle TN with the exception of
portions of Franklin county TN, Jackson, and Dekalb counties.
These low level clouds will likely stick around for much of the
day, which will limit daytime heating. Weak WAA from southeasterly
sfc flow will help, but will not be able to overcome the lack of
sunshine. Therefore, expect afternoon highs this afternoon to
struggle to climb above the mid to upper 40s.

As we head into tonight, a short wave trough will eject eastward
across the Tennessee Valley pulling a cold front through the
forecast area. This will spread light rain from west to east
starting this evening and continuing through the overnight
period. Low to medium (30-50%) chances of precip is expected
with the greatest probabilities further to the south. Overall,
not expecting much in accumulation with the current forecast only
having between a few hundredths to around a tenth of an inch by
Monday morning.

&&

.SHORT TERM...
(Monday through Tuesday Night)
Issued at 950 AM CST Sun Dec 7 2025

A longwave upper level trough will be positioned across much of
the eastern third of the CONUS as we start the day on Monday.
This will allow colder air to filter in post cold front, resulting
in a chilly start to the new work week. Afternoon highs on Monday
will only top out in the mid 40s, but with a tight pressure
gradient during the day, expect winds to gust 15-20 mph at times
making it feel a bit colder. The true colder airmass will be felt
Monday night as the winds subside becoming light and combined with
clear skies making for ideal radiational cooling conditions. Lows
will drop into the mid to upper 20s.

The aformentioned upper level trough axis will shift eastward on
Tuesday. This will bring some weak WAA in the form of sfc winds
becoming southwesterly. While not expecting a warm day on
Tuesday, we should return to the lower 50s, bringing an end to a
several day streak of highs only in the 40s. Not nearly as cold
Tuesday night as lows only drop into the mid 30s.

&&

.LONG TERM...
(Wednesday through Saturday)
Issued at 855 PM CST Sat Dec 6 2025

Wednesday may be the best day of the entire forecast as high pressure
at the surface will promote dry and mostly sunny conditions. As a
result, high temperatures will make a run at the 60 degree mark in
some locations by the afternoon. A fast-moving trough over the Great
Lakes will attempt to push a cold front south toward the region from
the Ohio Valley Wednesday evening into Wednesday night. This front
will probably struggle to make it all the way into the area, but a
secondary shortwave will interact with this feature and generate some
low chances (20-40%) chances for rain showers Thursday and Thursday
night. In wake of this system, a cooler, drier air mass will settle
into the area by Friday.

A broad upper-trough situated over southern Ontario will
become the dominant weather feature over the eastern CONUS late this
week into the weekend. Several subtle shortwaves will traverse this
feature, bringing additional reinforcing shots of cooler air into the
region. Highs on Friday will peak in the mid to upper 40s, with
overnight lows dropping into the lower 20s. Saturday looks to be even
chillier as high temperatures will struggle to climb above the 40
degree mark -- with lows Saturday night in the Teens being common.
Saturday night we may need to watch wind chills as readings in the
single digits in a few locations may occur along the higher terrain.
Regardless, it`s important to recognize that a spill of colder
weather and below normal temperatures will be favored late next week
into the following week for mid-December. Make sure you review common
sense safety rules for cold weather and make sure you`re prepared.

&&

.AVIATION...
(18Z TAFS)
Issued at 1113 AM CST Sun Dec 7 2025

IFR ceilings continue at the start of the TAF period, but will
gradually improve to MVFR from west to east this afternoon. Some
visibility restrictions are still ongoing at HSV and will likely
continue at times for a few hours after lunch. Rain chances begin
to increase late tonight from west to east bringing back some
chances for IFR conditions. Still uncertain about the timing and
how long they last so have left within a prob 30 group at this
time. Rain should end shortly before sunrise but the MVFR stratus
deck will remain through the end of the period.

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...None.
TN...None.
&&

$$

NEAR TERM...GH
SHORT TERM....GH
LONG TERM....AMP
AVIATION...GH