458
FXUS65 KGGW 010855
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
155 AM MST Sun Nov 1 2026

.KEY MESSAGES...
- Patchy fog continues through tomorrow morning.

- Light rain spreads north in the afternoon, continuing through
  Monday.

- Generally dry weather is expected through the remainder of the
  week.

&&

.DISCUSSION...
Upper trough will continue digging into the western states today.
Fog will continue to impact portions of the region through the
morning with some locally dense fog, reducing visibility in spots
to 2 mile or less.

As the Pacific upper trough moves through the Great Basin, a
Colorado low is expected to develop ahead of it. This will spread
precipitation northward, and will generally favor the Yellowstone
basin tonight into Monday. Splitting in the upper trough near the
Canadian boarder will keep cold air from being drawn southward,
and result in little to no mixed precipitation or snow. As the
surface low deepens, an increase in winds will result by Monday
afternoon.

A progressive, unsettled pattern will keep next week interesting
with repeated upper level troughs.

FORECAST CONFIDENCE & DEVIATIONS:

No changes to NBM.
A lot of uncertainty regarding fog, low cloud and precipitation
today.

&&

.AVIATION...
LAST UPDATED: 0800Z

FLIGHT CAT RANGE: MVFR, IFR during patchy fog and low clouds.

DISCUSSION: Lingering MVFR/IFR stratus will continue through
today. Low stratus and patchy fog cannot be ruled out again
overnight. Widespread rain begins after 0z Monday.

&&

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

$$

weather.gov/glasgow