FXUS65 KGGW 091015
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
315 AM MST Mon Dec 9 2024

.DISCUSSION...

KEY MESSAGES:

- Winter Weather Advisory through this afternoon for lingering blowing
  snow, snow showers and icy conditions

- Much colder conditions midweek with highs near zero Wednesday in
  far NE Montana, before a warming trend into the weekend

- Daily chances for light snow showers or flurries continue


WEATHER PATTERN OVERVIEW:

As the current system winds down and pushes to the east, winds
have decreased enough along with improving visibilities to drop
the Blizzard Warning. Any accumulations from lingering snow
showers today will be mostly over the Big Sheeps and other areas
south of the Missouri River. The primary impact will be icy
conditions and the extent of blowing/drifting. Under near
northerly flow aloft, daily chances of light snow showers continue
for the next few days. The coldest air will remain to the
northeast, but attempt to push toward the NE corner of Montana
with forecast wind chills nearing -25 around Plentywood Tuesday
night. The flow will turn more westerly over the weekend as
temperatures moderate to slightly warmer than normal levels.

FORECAST CONFIDENCE & DEVIATIONS:

With lingering moisture and cold air advection, boosted snow
chances slightly today. Confidence is low to medium for how much
blowable snow will be present during the day. There is typical
confidence in the pattern for the rest of the week, with the most
uncertainty being the temperature gradient from SW to NE Tuesday
night through Friday.

&&

.AVIATION...

LAST UPDATED: 0930Z

FLIGHT CAT RANGE: MVFR to VFR

DISCUSSION: Periods of light snow showers along with mainly MVFR
ceilings linger through tonight. Winds out of the W/NW will
continue to taper off into this evening, still gusting up to 30
knots prior to 21Z.

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 5 PM MST this afternoon for
Central and Southeast Phillips-Central and Southern Valley-
Daniels-Dawson-Eastern Roosevelt-Garfield-McCone-Northern
Phillips-Northern Valley-Petroleum-Prairie-Richland-Sheridan-
Southwest Phillips-Western Roosevelt-Wibaux.

&&

$$

weather.gov/glasgow