752
FXUS65 KGGW 050603
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
1203 AM MDT Sat Sep 5 2026

.KEY MESSAGES...

- Warm and dry weather is expected today.

- Shower and thunderstorm chances start tonight and continue on
  Sunday as an upper low moves towards Montana.

- Widespread rain is expected Sunday night through Monday night as
  the upper low moves through Montana.


&&

.DISCUSSION...

WEATHER PATTERN OVERVIEW:
A cold front will moving through NE Montana early this morning.
There has been a few isolated thunderstorms in or near the
forecast area during the night. Temperatures will somewhat cooler
today with highs in the 80s west and lower 90s east.

The ridge moves east over the weekend, so precipitation chances
increase as an upper trough/low moves in. The GFS and ECMWF
ensembles have a high probability of over an inch of rain between
Sunday and Tuesday north of US 2 with lower precipitation amounts
expected to the south.

An airmass on the humid side is expected to move in from the east
on Sunday. Look for chances for showers and isolated strong thunderstorms
in some areas on Sunday. SPC has a marginal risk of severe
weather on Sunday for most of NE Montana.

The heaviest rain with this system is expected to be Sunday night
and Monday as the surface low moves north across eastern Montana.
The upper low moves through the area Monday and Monday night and
becomes stacked with the surface low over Saskatchewan on Tuesday.
Strong west winds are expected across the region on Tuesday.

The low moves to the east Tuesday and Wednesday and Thursday looks
dry at this point as upper ridge moves in.
FORECAST CONFIDENCE & DEVIATIONS:

There is low confidence in any shower and thunderstorm chances
tonight with confidence increasing on Sunday to high confidence
Sunday night and Monday.

There is moderate confidence in rainfall amounts from Sunday
through Tuesday.


&&

.AVIATION...

LAST UPDATED: 0630Z

FLIGHT CAT RANGE: VFR.

DISCUSSION: There will be some mid and high clouds at times today
and tonight. Look for some daytime cumulus this afternoon. There
will be chances for showers and thunderstorms at times tonight.
WIND: North to NW 5 to 15 knots this morning becoming north to NE
this afternoon and remaining north to NE tonight.

&&

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

$$

weather.gov/glasgow