299
FXUS65 KPUB 090549
AFDPUB

Area Forecast Discussion
National Weather Service Pueblo CO
1049 PM MST Mon Dec 8 2025

.KEY MESSAGES...

- Warm and breezy on Tuesday, with areas of strong winds gusting
  50 to 60 mph over mountains through the day.

- Dry and mild temperatures expected through much of the long
  term period.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 216 PM MST Mon Dec 8 2025

Mild December weather at many locations today, as northwest
flow aloft continues. Have seen some gap and lee slope w-nw
winds gusting 20-30 kts at times, especially through much of the
Arkansas Valley, along with a corresponding boost in
temperatures, as readings have pushed into the 50s to near 60f
over most of the plains. Tonight and Tuesday, mid/upper level
winds increase, as strong upper jet digs into the nrn High
Plains. Should see winds increase across much of the high
terrain through the night, with gusty winds spreading to lower
east slopes and gap flow favored regions (Arkansas Valley from
Canon City to Pueblo plus downstream from La Veta Pass to
Walsenburg) toward sunrise. As a result, overnight min temps
will be milder, especially in wind-prone regions. Strong winds
aloft continue through the Tuesday, with gusts 40-60 mph likely
over the higher peaks and passes, especially from Monarch Pass
northward. Gap flow winds will persist as well, with gusts 35-45
mph around Walsenburg, 25-35 mph Pueblo/Canon City. Deep mixing
should boost max temps a few degf at many areas, and ran with
numbers slightly higher than blended guidance, especially in
windy locations. Might be enough moisture for a few snow
showers late int the day over the higher peaks around
Leadville, but no substantial snowfall expected, though winds
will be strong enough for widespread blowing/drifting snow,
especially at/above pass level.

&&

.LONG TERM /TUESDAY THROUGH MONDAY/...
Issued at 232 AM MST Mon Dec 8 2025

Tuesday: For Tuesday, relatively quiet weather is anticipated for
south central and southeastern Colorado, though with windy
conditions for many. Northwesterly flow will be in place over the
region, and given the lack of any major forcing, dry conditions are
expected. The exception to this may be an isolated snow shower or
two along the central mountains where orographic forcing will be
ongoing. Beyond that though, as alluded to, it will be fairly breezy
areawide. Weak mountain wave dynamics are anticipated to be in
place, allowing for strong winds up to around 60 mph to develop
along the leeward side of many of the major mountain ranges,
particularly the Sawatch, Sangre de Cristo, and Rampart Mountains.
While stronger winds will be possible along the mountains,
confidence in that is low (20%) at this time, as model guidance
keeps stronger flow north of the area, and the wind orientation,
northwesterly, doesn`t usually favor intense downslope windstorms.
Outside of that, gusty winds up to 40-50 mph are expected in the
prominent gap flow areas of La Veta Pass and through the Arkansas
River Valley from Fremont County into Pueblo County, with gusts of
20-25 mph elsewhere. Otherwise, mild temperatures and partly cloudy
skies are anticipated for the area. Looking at temperatures, much of
the region will warm to above seasonal values thanks to the
downsloping winds, with 50s to 60s for the plains, 40s for the
valleys, and 30s to 40s for the mountains.

Tuesday Night - Sunday: For the rest of the long term period, quiet
weather prevails for south central and southeastern Colorado.
Northwesterly will remain in place over the region, and given the
lack of major forcing, dry conditions are expected to persist.
Confidence in this pattern is high (80%) given strong agreement
between ensemble model guidance. Like Tuesday though, an isolated
snow shower can`t be ruled out along the central mountains where
orographic forcing will be greatest. Otherwise, breezy conditions
will continue, especially along the mountains, with pockets of mid
to high level clouds expected through this period. As for
temperatures, above seasonal temperatures are anticipated to
continue given downsloping winds. With that said though, there may
be backdoor cold fronts that push across the area during this
timeframe, which would drop temperatures, especially across the
plains.

&&

.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 1041 PM MST Mon Dec 8 2025

Variable mid and high clouds will overspread the region over the
next 24 hours. Winds will remain light and variable at KALS.
KCOS and KPUB will see gusty west to northwest winds on Tuesday,
kicking in earliest at KPUB as winds spread down the Arkansas
River valley. KCOS may see a later timing of northwest winds. As
winds increase during the evening low level wind shear will
become an increasing concern at both KCOS and KPUB and have
introduced a WS group in both terminals which should last
through 06z. -KT

&&

.PUB WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

SHORT TERM...EHR
LONG TERM...SIMCOE
AVIATION...KT