897
FXUS65 KGGW 191905
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
105 PM MDT Wed Aug 19 2026

.KEY MESSAGES...
- Typical mid to late August conditions are expected through the
  weekend with warm daytime conditions and comfortable nights.

- Dry weather is expected until the weekend when the southwest
  monsoonal flow will bring another round of thunderstorms.

- Warm and dry conditions resume next week as Western ridge
  rebounds.


&&

.DISCUSSION...

WEATHER PATTERN OVERVIEW:
NW upper flow over the area will give way to a building upper
ridge over the West into Saturday. This will give the area
generally dry conditions, but a nocturnal disturbance could drop
in across the northern zones the next couple nights.

An upper level low off the Pacific NW coast will then move in our
direction and tag up with some SW monsoonal moisture for the
chance of showers/storms that move northeast through the area
Saturday night and exit Sunday. Severe thunderstorms are not
expected but gusty winds could accompany them.

Strong winds could follow the front/trough for Sunday and Monday,
bringing some fire weather concerns but highlights are not
expected.

Ridge rebounds early next week in the wake of the departing
disturbance to bring dry conditions with temperatures slightly
above normal.

FORECAST CONFIDENCE & DEVIATIONS:
Pops were modified through Thursday night to blend with CAMS and
to generally raise them above NBM (as NBM has been on the dry
side lately). Otherwise, NBM looked good with the other elements.
TFJ

&&

.AVIATION...
UPDATED: 1900z

FLIGHT CONDITION: VFR

DISCUSSION: A NW wind with a gust to about 20 kts into the
evening hours can expected, then winds will become light and
variable later tonight with a few higher clouds.

Haze in the area this afternoon is expected to push south of the
area tonight. Visibility less than 6 miles is not expected. TFJ

&&

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

$$

weather.gov/glasgow