610
FXUS64 KHUN 091143
AFDHUN

Area Forecast Discussion
National Weather Service Huntsville AL
543 AM CST Tue Dec 9 2025

...New AVIATION...

.KEY MESSAGES...
Updated at 1025 PM CST Mon Dec 8 2025

 - Low to medium chances of freezing fog area-wide tonight into
   early Tuesday morning.

 - Subfreezing temperatures tonight, then a gradual warming trend
   through midweek.

 - Confidence is increasing in the potential of colder conditions
   early next week.

&&

.NEAR TERM...
(Today)
Issued at 410 AM CST Tue Dec 9 2025

Satellite data and surface observations indicate that a layer of
low stratus clouds (which has been in place for the past couple of
days) is gradually eroding from NE-to-SW, with temperatures
currently ranging from the m-u 20s in the northeastern portion of
the CWFA (where skies have cleared) to the mid 30s in the
southwestern portion (where skies remain cloudy). Although the
presence of the cloud deck has thus far inhibited development of
freezing mist/fog, it would not be surprising to see some develop
between 10-14Z (especially to the N/E of Huntsville).

Over the course of the day, a lengthy surface ridge extending
from the northwest Gulf Coast into New England will shift
southeastward. As the pressure gradient contracts between the
ridge and a developing surface low dropping southeastward over the
northern Plains, a modest increase in SSW flow will occur across
our region. Although periods of scattered-broken high clouds can
be expected as a weak mid-level wave shifts southeastward over the
TN Valley, these should have only a minor impact on temperatures
with afternoon highs still predicted to reach the 45-50F range (a
few degrees cooler atop the Cumberland Plateau).

&&

.SHORT TERM...
(Tuesday night through Thursday)
Issued at 1025 PM CST Mon Dec 8 2025

A deeper southerly flow should be in place for the mid week, as
high pressure remains to our east. The southerly flow and higher
heights/thicknesses will result in milder conditions. Lows should
cool into the 30s (lower 30s east to upper 30s west) with light
SE winds. A storm system forming over SW Canada will head eastward
along the border, reaching the Great Lakes region on Wednesday. A
cold front trailing south of this cyclone is forecast to move
across this area Wed afternoon. Given that most of the energy
should remain closer to the main storm, no precipitation is
expected across this area. But with a SW-W flow and more sun, high
temperatures for the mid week should rise into the mid to upper
50s. Cooler air west of the front filtering in will make for
colder conditions Wed night with lows falling to around 30. Not as
mild Thursday with highs in the mid 40s to around 50.

&&

.LONG TERM...
(Thursday night through Monday)
Issued at 1025 PM CST Mon Dec 8 2025

Slightly cooler than seasonal temperatures are forecast Thursday
night, with lows falling into the low/mid 30s. Closer to normal
readings will return on Friday with highs into the mid/upper 50s
under partly sunny skies. With cloud cover on the increase, lows
Fri night should range in the 30s.

Yet another storm system moving in from the WNW will bring lower
end chances of showers across mainly the western areas Saturday
afternoon. Rain chances should spread eastward across the Valley
Saturday night, then end from west to east over our eastern areas
Sunday morning. This system will bring colder air from up north to
across the eastern CONUS early next week. Lows Sat night should
cool from the upper 20s our Tennessee counties to mid 30s south of
the Tennessee River. A chilly airmass will be more noticed
Sunday, with highs only in the upper 30s north to mid 40s south.
The start of the next work week, Monday will be on the cold side,
with highs during the day into the mid/upper 40s.

&&

.AVIATION...
(12Z TAFS)
Issued at 543 AM CST Tue Dec 9 2025

Although the stratus layer has gradually eroded from NE-to-SW
since issuance of the previous aviation forecast, MVFR cigs will
persist thru 15Z at MSL, with VFR conds at HSV. Beyond 15Z, sct-
bkn mid and high-lvl clouds will spread across the region in WNW
flow aloft, as sfc winds assume a SSW component and increase to
5-10 kts. Clouds layers aloft will continue to increase in both
coverage and density this evening, and LLWS has been introduced
beyond 4Z as models suggest that a WSW low-level jet will increase
into the 45-55 knot range during this timeframe.

&&

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

&&

$$

NEAR TERM...70/DD
SHORT TERM...RSB
LONG TERM...RSB
AVIATION...70/DD