Huntsville, Alabama 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

280
FXUS64 KHUN 131730
AFDHUN

Area Forecast Discussion
National Weather Service Huntsville AL
1130 AM CST Tue Jan 13 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 1022 AM CST Mon Jan 12 2026

 - A slight warmer trend today, with rain chances returning
   Wednesday.

 - Much colder air will push southeast into the area during the
   evening hours on Wednesday, possibly producing a brief window
   of a rain/snow mix. No accumulations are anticipated.

 - Periodic rounds of much colder air are expected to continue
   into next weekend.

&&

.NEAR TERM...
(Rest of Today and Tonight)
Issued at 1022 AM CST Tue Jan 13 2026

A broad area of high pressure over the southern CONUS was
controlling the weather across the Mid and Deep South today.
Area temperatures at 10 AM were rising through the 40s to around
50 southerly winds of 5-15 mph. Highs later today should warm into
the mid/upper 50s.

At the moment, a ridging west and troughing east upper flow
pattern will become dramatically more amplified as we go into the
mid and latter half of the week, as a vortex over NE Canada moves
southward to over the Hudson Bay region, and across Ontario,
Quebec and the Great Lakes in the late week. A few to scattered
high clouds in the polar jet to our north, were beginning to move
southward towards the Tennessee Valley. This should result in an
increase in clouds tonight. Not as cool tonight with lows from the
mid 30s to lower 40s.

&&

.SHORT TERM...
(Wednesday through Thursday night)
Issued at 1022 AM CST Tue Jan 13 2026

An upper level system now over Alberta will move rapidly to the SE
tonight into Wednesday. The approach of this system will in part
help to amplify upper troughing over the eastern Lower-48.
Moisture associated with this disturbance will result in an
increase in clouds tonight. Showers with this system will begin
impacting the NW portions of the Tennessee Valley beginning Wed
morning. The showers should overspread the area from NW-SE during
the course of the day. With the clouds and higher rain chances,
high temperatures on Wednesday should be cooler at around 50
degrees. Although rain chances briefly will rise from 50-90
percent, liquid amounts should only amount to 1/10 to 1/4 of an
inch.

As drier air filters in after the system moves south of the area,
and the passage of a surface cold front, precipitation should end
from NW-SE Wed evening. The last few runs of the NBM look
unrealistic in ending the precip abruptly. Will make minor trends
for a more realistic appearance. Air temperatures as near midnight
will be at or below freezing the entire forecast area. Precip by
this time should be over and done with. A stiff breeze of 5-15 mph
in the evening and overnight will also help to dry outdoor
surfaces, thus no accumulations are expected at this time. Low
temperatures towards daybreak Thursday will chill into the into
the lower 20s. Could not rule out some upper teens given how cold
this next Arctic plunge is.

Thursday will feature generally sunny skies but very cold
temperatures. Highs on Thu will only rise into the low/mid 30s.
Some of the higher elevations of our southern middle Tennessee
counties may not warm above 30 degrees. A brisk NW wind of 5-15
mph will produce wind chill values around 10 degrees cooler than
the actual air temperature. Chilly conditions will continue Thu
night with lows around 20 degrees. The blends have light winds in
the evening picking up into the 5 mph range in the overnight. But
if winds remain light, temps could go into the mid teens by Fri AM.

&&

.LONG TERM...
(Friday through Monday)
Issued at 946 PM CST Mon Jan 12 2026

A surface low is forecast to develop over southeast Canada along
with an associated cold front that stretches southwest from the
surface low. As the surface low pushes southeast Thursday
night/Friday into the central Great Lakes region, it pushes a
surface front southeast ahead of it via NW flow. Through Friday,
all guidance keeps deeper moisture well north of Tennessee. Expect
cloud cover to increase during the day on Friday, especially
north of the Tennessee River. However, the moisture column looks
to dry for any precipitation near the boundary layer. The cloud
cover should help keep us tad cooler than otherwise, but warm air
advection ahead of the front and some morning sunshine will allow
temperatures to climb into the mid to upper 40s.

Friday night, it looks like the front may be pushing further
southeast and into NW Alabama and south central Tennessee. Overall,
we will still be in a warm air advection pattern early in the evening,
before the front pushes through overnight. Models are fairly divergent
concerning whether we see a pre-frontal trough axis or the main cold
front moving through overnight. The main difference would be
slightly warmer temperatures around daybreak if only a pre-frontal
trough axis moves south overnight. Kept with NBM (25 to 30 degrees),
which is likely on the colder side, but this may need to be revised
up with time.

With most guidance the colder air definitely is ushered southeast
into the area during the day on Saturday. behind the initial front
or pre-frontal trough axis (whichever ends up being correct). Strong
cold air advection continues through the day, as another re-enforcing
cold front rotates southeast around the main parent low still over
the Great Lakes region during the afternoon hours into northern
Alabama. This will likely allow for cloud cover initially on the
decrease to become widespread again over northern Alabama and
southern middle Tennessee as the day progresses. Between the cold air
advection and cloud cover, temperatures will be hard pressed to
climb out of the lower 40s at best. Given the fairly widespread cloud
cover, not sure if models are handling how cold the afternoon highs
will be. Some models bring some light snow showers close to our
southern middle Tennessee counties Saturday evening, but most keep it
east or southeast of the area.

The bigger story will likely be another shot of arctic air that will
pushes southeast Saturday evening, as an area of strong high
pressure drops southward from central Canada. This will produce a
another period of very cold weather with temperatures dropping into
the upper teens to around 20 degrees by Sunday morning. Despite
abundant sunshine on Sunday in most areas, highs look to only climb
into the 30s at best. This may be a bit optimistic in southern middle
Tennessee, which might see some cloud cover in the morning. Sunday
night with high pressure building over the area should be even
colder. Winds should be fairly light and with clear skies lows will
drop into the 15 to 20 degree range in most locations (maybe a tad
cooler).

During the day on Monday, the northwest flow aloft becomes much less
amplified. However, northwest flow will still be in place. However,
with abundant sunshine, temperatures should climb into the upper 30s
to lower 40s despite the cold start.

&&

.AVIATION...
(18Z TAFS)
Issued at 1130 AM CST Tue Jan 13 2026

An upper level system forming over the northern High Plains will
move to the SE into the overnight and on Wed. This disturbance
will result in an increase in clouds over the Tennessee Valley
mainly tonight and on Wed. Showers with this system could begin
impacting areas around KMSL after daybreak Wed, and in the
vicinity of KHSV in the late morning. VFR conditions should
prevail until late in the TAF, when TEMPO MVFR reductions impact
NW Alabama.

&&

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

$$

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