771
FXUS65 KGGW 192118
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
218 PM MST Wed Nov 19 2025

.DISCUSSION...

KEY MESSAGES:

- Areas of low cloud cover and sprinkles will continue through
  this evening before precipitation chances decrease tomorrow.

- Mild temperatures continue through Monday.

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

WEATHER PATTERN OVERVIEW:
Low cloud cover continues to remain over the area. Northwest winds
have picked up enough to mix some of the surface moisture away. A
Lake Wind Advisory is in effect until 5 PM for strong northwest
winds. There is a low (20 percent) probability of fog developing
again tonight before dissipating by late morning. 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:
Made adjustments to winds on Day 1 into Day 2. Also added a chance
of PoPs through 12Z. The remainder of the forecast follows the
base NBM. There is low confidence of fog redeveloping late tonight
into tomorrow morning. 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 precipitation accumulation.

&&

.AVIATION...
Update Time: 2100Z

Flight Category: IFR becoming MVFR/VFR.

Synopsis: Low clouds continue to remain over the region. Ceilings
have slowly lifted to IFR conditions as a shortwave trough in
Canada slowly departs to the northeast of the area. There is high
confidence of scattered MVFR and VFR conditions occurring after
09Z, and VFR conditions taking hold after 18Z. A few sprinkles and
flurries will move through TAF sites through 12Z as well.

WINDS: Northwest at 12 to 23 knots with gusts to 30 knots,
decreasing to light and variable after 03Z. For KGGW, winds will
become southeast at 8 to 13 knots after 15Z.

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.


&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory until 5 PM MST this afternoon for Central and
Southeast Phillips-Central and Southern Valley-Garfield-McCone-
Petroleum.

&&

$$

weather.gov/glasgow