840
FXUS64 KHUN 050617
AFDHUN

Area Forecast Discussion
National Weather Service Huntsville AL
1217 AM CST Fri Dec 5 2025

...New AVIATION...

.KEY MESSAGES...
Updated at 1047 AM CST Thu Dec 4 2025

 - Periods of mainly light rain or drizzle will linger shortly
   after daybreak. Then remaining cold and cloudy with highs only
   in the 40 to 45 degree range.

 - Fog development is expected tonight into Friday morning and
   again Saturday. This fog could become dense and could freeze in
   some areas of NW Alabama and southern middle Tennessee.

 - Low chances of precipitation may return to the forecast on
   Sunday into early next week.

&&

.NEAR TERM...
(Rest of tonight and Friday)
Issued at 1047 PM CST Thu Dec 4 2025

The strongest forcing has pushed east into Georgia over the last
few hours. Light to moderate rainfall still lingers behind this
shield of precipitation. Thus, expect a mixture of light rain and
drizzle to linger in far NE ALabama until around daybreak before
ending. Not expecting alot more rainfall, but another 1/10 of an
inch or so could occur before ending.

Some patchy fog could occur right around daybreak. However,
mainly expect a cloudy and cold day. Highs with cloud cover and
initial weak cold air advection this morning should only reach the
40 to 45 degree range (coolest temperatures near the AL/TN border
and in portions of southern middle Tennessee).

&&

.SHORT TERM...
(Friday night through Sunday)
Issued at 1047 PM CST Thu Dec 4 2025

Tonight will likely be a better setup for more at least patchy fog
development across northern Alabama and southern middle Tennessee.
As winds decouple with a surface high building over the area,
winds will be very light. Luckily, most guidance still holds
mostly cloudy to cloudy conditions in place though. This should
mitigate the fog threat some. Wouldn`t be surprised to see some
patchy dense fog, but widespread fog (especially dense) may be
hard to get with such predominant cloud cover. For now included
patchy/areas of fog, but no dense fog. This may need to be
changed if forecast conditions warrant. Most areas should not see
temperatures dropping to 32 degrees or below. However, a few
locations in NW Alabama and southern middle Tennessee may around
daybreak on Saturday, so a bit of freezing fog could be possible.
Lows in the lower to mid 30s are expected.

Zonal flow and neutral to weak warm air advection mainly sets up
Saturday through Sunday. We may finally see some sunshine again
during the afternoon hours on Saturday. This insolation and weak
warm air advection should allow high temperatures to climb back
into the 45 to 50 degree range mainly.

By Saturday night, another longwave trough axis begins to swing
southeast from the western Great Lakes area towards the Ohio
Valley. This will likely bring some cloud cover back into the
area in the evening hours and mostly cloudy conditions back into
the area by daybreak on Sunday. Stronger forcing and better
moisture advection pools over the area on Sunday. Lows don`t look
to change much and should stay in the lower to mid 30s.

&&

.LONG TERM...
(Sunday night through Thursday)
Issued at 1047 PM CST Thu Dec 4 2025

As this longwave trough axis pushes east and an attendant cold
front pushes into the area, some light showers will likely return
to the forecast. Expect the better chances of rain will be
mainly Sunday night into early Monday morning as longwave trough
axis moves through northern Alabama and southern middle Tennessee.
This should usher in some cooler air again early next week after
its associated cold front moves east of the area.

&&

.AVIATION...
(06Z TAFS)
Issued at 1213 AM CST Fri Dec 5 2025

MVFR to IFR CIGS are expected much of the TAF period. Some -RA
around 6Z will likely become light DZ at KHSV around 8Z or 9Z.
Expect some light DZ at KMSL after 06Z through 13Z. A tempo for
VSBYS dropping to 2SM was included between 9Z and 13Z at KHSV and
7Z to 11Z at KMSL. CIGS should become MVFR after 13Z at KMSL and
after 15Z at KHSV.

&&

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

$$

NEAR TERM...KTW
SHORT TERM....KTW
LONG TERM....KTW
AVIATION...KTW