792
FXUS65 KGGW 202109
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
209 PM MST Thu Nov 20 2025

.DISCUSSION...

KEY MESSAGES:
- Patchy to dense fog along the Milk and Missouri River Valley may
  return through mid-morning.

- Above seasonable temperatures continue through the weekend.

- Significant pattern change Monday night with cold temperatures
  and light snow through Thanksgiving.

- Wintry travel impacts possible for holiday travelers next
  weekend...monitor the forecast!

WEATHER PATTERN OVERVIEW:
Tonight and tomorrow: Patchy to dense river valley fog may return
tomorrow morning along the Milk and Missouri River Valleys but
should dissipate after sun-up impacting Highway 2 periodically
from Wolf Point to Saco. Wind speeds tonight may be sufficient in
keeping widespread freezing fog from forming, but there is higher
risk in the lower river valleys.

This weekend: The upper level pattern over the western states
will generally keep Montana under a ridge with broad dry zonal
flow into the weekend. This maintains above normal temperatures
and dry weather.

Next week: 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. If you are traveling for
the holiday weekend be prepared for mountain snow and poor
driving conditions in western Montana. There is much higher
confidence in accumulating snow in higher elevations within the
northern Rockies through the beginning of next week.

FORECAST CONFIDENCE & DEVIATIONS:
No deviations from NBM.

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.

&&

.AVIATION...
LAST UPDATE: 2000Z

FLIGHT CAT RANGE: VFR

DISCUSSION: Dense but shallow fog (1/4 mi or less) is possible
again tonight along the Missouri and Milk River Valley.

WIND: Light and variable to southwest winds through the cycle.

EQUIPMENT: KOLF AMD NOT SKED until repairs can be made.

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

weather.gov/glasgow