231
FXUS65 KGGW 201130
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
430 AM MST Thu Nov 20 2025

.DISCUSSION...

KEY MESSAGES:
- Dense fog has formed along the Milk and Missouri River Valleys
  and will stay through mid-morning.

- Mild temperatures continue through Monday.

- Colder air moves in Monday night that is expected to linger
  through Thanksgiving.

WEATHER PATTERN OVERVIEW:
Dense river valley fog has developed this morning along the Milk
and Missouri River Valleys and should dissipate around 8-10 AM or
after sun-up. This will likely be impacting Highway 2 periodically from
Wolf Point to Saco.

After that, the upper level pattern over the western states will
generally keep Montana under a ridge into the weekend. This
maintains above normal temperatures and dry weather through the
weekend. Models and ensembles are increasingly pointing toward a
pattern change early next week with much colder temperatures.
There are wide variations in precipitation potential in the models
and ensembles at this time for next week.

FORECAST CONFIDENCE & DEVIATIONS:
No deviations from NBM were observed.

There is HIGH confidence of temperatures dropping to near and
below normal by Tuesday.

There is MODERATE confidence of precipitation occurring next
week, with low confidence on accumulations.

GAH



&&

.AVIATION...
LAST UPDATE: 1115Z

FLIGHT CAT RANGE: Airport Shutdown - VFR.

DISCUSSION: Dense but shallow fog (1/4 mi or less) has develop
and snaked up the Missouri and Milk River Valleys and is
affecting KOLF and KGGW. Rough timing for fog looks to exit around
15-16Z. A FEW mid level clouds may be possible through the rest of
the cycle.

WIND: Light and variable or south through the cycle.

EQUIPMENT: KOLF`s ASOS telecomm circuit is down and can not be
dialed into. Therefore, AMD NOT SKED for this TAF until repairs
can be made.

GAH

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 10 AM MST this morning for Central and
Southern Valley-Western Roosevelt.

&&

$$

weather.gov/glasgow