469
FXUS65 KGGW 100914
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
214 AM MST Wed Dec 10 2025

.DISCUSSION...

KEY MESSAGES:

- A wintry mix of rain, snow and freezing rain is expected today
  through Thursday evening.

- A strong winter storm with accumulation is possible Thursday
  evening through Saturday morning.

- Bitter cold temperatures are expected Thursday night through
  Saturday night.


WEATHER PATTERN OVERVIEW:

Model agreement continues to increase, allowing forecast
confidence to reach better than average levels for the upcoming
series of winter storm systems set to push through the region.

A fluctuating front will be the focus for precipitation and the
border between rain and snow over the next few days. Model data
and expected environmental conditions continue to support the
chances for freezing rain between those two. With the wintry mix
and possible ice accumulation, a winter weather advisory remains
in effect for snow between 1 and 4 inches and ice between a trace
and 0.10 inch between today, tonight, and Thursday.

That weather system will almost seamlessly morph into the weekend
snow storm. A winter storm watch has been issued for portions of
northeast Montana where model data indicate significant
accumulating snow could amount to 5 to 12 inches. More specific
data will become available in the day or two, but generally
expect less amounts in the northeast corner of the state and much
higher amounts toward central Montana.

Bitter cold air moves into the region Thursday night and remains
over the area through Saturday night with lows below zero in all
areas and wind chills below -20 north.

FORECAST CONFIDENCE & DEVIATIONS:

Average to high confidence on the mixed precipitation occurring
today, tonight and Thursday, along with fluctuating temperature
boundaries.

Average to high confidence on the accumulating heavy snow in the
SW half of the forecast area between from Thursday through
Saturday with lower confidence in the specific snow amounts for
the NE corner zones.

High confidence on the bitter cold temperatures Thursday night
through Saturday night.


&&

.AVIATION...

LAST UPDATED: 0900Z, Wednesday morning 12/10

FLIGHT CAT: VFR, becoming a mix of MVFR/IFR in snow and low clouds
this afternoon and remaining MVFR/IFR tonight.

DISCUSSION: Increasing mid level clouds will move into the area early
this morning with low clouds and snow moving by 18-21z today. The
snow will mix with rain and freezing rain at times tonight and
Thursday morning with significant icing possible. Between Thursday
night and Saturday morning, a significant snow storm is likely
with accumulations

WIND: Variable winds less than 10 knots early becoming east to SE
5 to 15 knots this morning and continue this afternoon. SE to
south winds 5 to 15 knots are expected tonight.


&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 8 PM MST Thursday for Central and
Southeast Phillips-Central and Southern Valley-Daniels-Dawson-
Eastern Roosevelt-Garfield-McCone-Northern Phillips-Northern
Valley-Petroleum-Prairie-Richland-Sheridan-Southwest Phillips-
Western Roosevelt-Wibaux.

Winter Storm Watch from Thursday evening through Saturday
morning for Central and Southeast Phillips-Central and Southern
Valley-Dawson-Garfield-McCone-Northern Phillips-Petroleum-
Prairie-Southwest Phillips.

&&

$$

weather.gov/glasgow