801
FXUS65 KGGW 190726
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
126 AM 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.

&&

.DISCUSSION...

WEATHER PATTERN OVERVIEW:
The persistent upper ridge will build into the northern Rockies
from the Four Corners area through the end of the week. This
should suppress thunderstorm activity while temperatures tick up a
bit.

A weak disturbance moving across the Canadian prairies on Friday
could bring a few thunderstorms into northeast Montana. High
pressure following the disturbance will also bring stronger winds
into the region, and should increase fire concerns.

A trough from the Pacific Northwest will cut through the ridge
over the weekend. This will bring an increase in thunderstorms
Saturday night with a slight risk of heavy rain and gusty winds
when they move northeast through the area. Strong winds could
follow the front/trough for Sunday and Monday, continuing the
higher fire concerns.

FORECAST CONFIDENCE & DEVIATIONS:

Pops were given a nudge to provide better areal continuity where
thunderstorms are possible through tonight. Otherwise, the NBM
was given the royal treatment.

&&

.AVIATION...
VFR. Generally dry conditions with light winds are expected with
high pressure building into the region today.

&&

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

$$

weather.gov/glasgow