Sidney, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

579
FXUS65 KGGW 200638
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
1238 AM MDT Thu Aug 20 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 evening. 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:
NBM followed for the forecast period. Confidence for timing of
precipitation chances over the weekend are moderate with poor
continuity from forecast runs.


&&

.AVIATION...
UPDATED: 0500z

FLIGHT CONDITION: VFR

DISCUSSION: Quiet weather will rule. Expect light north to
northwest winds with sct mid clouds at times across nemont through
Thursday.


&&

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

$$

weather.gov/glasgow