FXUS65 KGGW 232117
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
217 PM MST Thu Jan 23 2025

.DISCUSSION...

KEY MESSAGES:

- Another round of light snow and blowing snow is expected this
  evening through overnight tonight.

- Generally warmer and drier conditions will prevail for next
  week.

WEATHER PATTERN OVERVIEW:

As the low clouds and flurries from this morning have drifted away
and diminished into the Dakotas, partly sunny skies today have
been replaced by an approaching thick deck of mid and high level
clouds from the Canadian Rockies. Radar reflectivities have
already begun to show up, but there is still a shallow dry layer
at the surface that has not yet saturated.

Beginning this evening, models are in good agreement, showing a
lowering of the cloud deck and more saturation in the lowest
layers to allow for snowfall to spread from north to south
through our region. Similar to the last several precip events for
us, most of the snow accumulation will be limited to favored
upslope areas, i.e. the Little Rocky Mountains, the Big Sheep
Mountains, and the Snowy Belts (1 to 2 inches at most). Otherwise,
all other locations in NE Montana can expect a trace to around 0.5
inch of snow through Friday morning. Even though some blowing snow
is expected, widespread overall impacts will be minimal and the
need for any headline products are not anticipated.

Friday will break out to partly sunny skies for western locations,
while widespread gusty winds from the NW remain (30-35 mph). Late
Friday night, lingering leftover flurries will be possible for
a few eastern locations.

Beginning Saturday, a more calm and dry weather pattern sets into
the region and prevails through the remainder of January. Multiple
periods of chinook winds off the Rocky Mountains are expected.
Daily high temperatures next Sunday through Wednesday will be
above normal.

FORECAST CONFIDENCE & DEVIATIONS:

High confidence in chances for light snow this evening and
tonight.

Average to lower confidence on exact snowfall amounts.

No deviations from NBM for Day 3 onward.



&&

.AVIATION...

PATTERN: Broad upper level troughing and thickening clouds are
approaching our region from the north. Light snow fall is expected
later this evening through overnight tonight. Expect partly sunny
skies from the west on Friday. A few lingering flurries may be
possible for KSDY and KGDV on Friday.

FLIGHT CONDITIONS: VFR for all sites, becoming MVFR/IFR starting
at 06Z tonight amid snowfall.

WINDS: Today from the S and SW around 10 kts, switching around
from the NW beginning tonight at 20 kts with some stronger gusts,
lasting beyond this TAF cycle.

&&

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

$$

weather.gov/glasgow