800
FXUS65 KBOU 251137
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
437 AM MST Tue Nov 25 2025

.KEY MESSAGES...

- Breezy today, especially over the mountains and northeast
  corner.

- Cooler today with high temperatures a bit cooler than normal.

- Very light snow possible in the mountains tonight and on
  Wednesday.

- First taste of winter weather next weekend, with a chance of
  snow for the mountains and plains.

&&

.DISCUSSION /Through Monday/...
Issued at 244 PM MST Mon Nov 24 2025

Water vapor imagery shows a shortwave trough over Montana headed
east-southeastward. This trough will pass well to the north of
Colorado late tonight. A cold front associated with the trough
will move across the plains early tomorrow morning. This will
bring in cooler temperatures tomorrow with highs roughly 5 degrees
below normal. This will also bring in gusty winds. The far
northeast plains may see gusts up to 45 mph tomorrow afternoon.
With such strong winds aloft, the higher mountains will see
gusts up to 65 mph tonight and tomorrow morning. In addition, a
few light snow showers could occur at high elevations tonight with
minimal accumulation.

Northwesterly flow aloft will be overhead on Wednesday with
subsident flow. Dry conditions are expected with near normal
highs. Ridging aloft will move overhead on Thursday and into
Friday morning. Mild and dry conditions are expected both days
with mostly clear skies.

Late Friday through the upcoming weekend will be one to watch for
the welcoming of winter to our area. Models disagree greatly on
the strength, location, and timing of a longwave trough over
Colorado, but they at least all have a longwave trough. Ensemble
data shows that highs across the plains have a good chance of
staying below freezing with lows in the teens. Ensemble data also
shows a moderate snowfall in the mountains is likely with a light
snowfall likely across the plains. There could be two waves of
precipitation depending on how the shortwave troughs play out
within the longwave trough. It`s reasonable to expect that travel
will be impacted especially in the mountains this upcoming
weekend. Right now the forecast mentions a chance for snow across
our entire CWA and there are not many other details to be
confident about right now.

&&

.AVIATION /12Z TAFS through 12Z Wednesday/...
Issued at 437 AM MST Tue Nov 25 2025

Models continue to show north-northeaterly upslope winds at DIA by
15Z-16Z this morning.  More due easterly upslope winds can be
expected this afternoon and early evening with normal drainage
patterns kicking in after 06Z tonight. There should not be any
ceiling issues.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Danielson
AVIATION.....66