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FXUS65 KGGW 072205
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
305 PM MST Fri Feb 7 2025

.DISCUSSION...


KEY MESSAGES:

1) Accumulating snow will continue for the southern tier zones
tonight with 1 to 3 inches of additional accumulations expected.

2) Below average temperatures will persist throughout the balance
of the forecast period over the next 7 days. Particularly
dangerous cold wind chills are likely Monday night into Tuesday
morning.

WEATHER PATTERN OVERVIEW:

Snow will continue steady at times this evening across southern
tier zones. Look for an additional 1 to 3 inches before snow ends
from west to east overnight. The Winter Weather Advisory remains
in effect across the south. Wind chills may approach 25 below
across Sheridan County and more scattered locations to the west.
Have opted to hold off on cold weather advisory headlines for now
given the marginal nature and the stronger impacts expected later.

Speaking of which, Saturday onward, look for cold weather to
continue with reinforcing arctic air on Sunday with another
potential round for light snow. Ensemble means are showing low
temperatures in the 20 to 30 below zero range by Monday night and
Tuesday morning.

FORECAST CONFIDENCE & DEVIATIONS:

NBM was used for the forecast here as it captured the existing
snow event and below normal temperatures well. Confidence remains
high on snow continuing tonight before ending with below normal
temperatures persisting through the forecast.


&&

.AVIATION...
A range of IFR to MVFR conditions will continue through tonight.
Mainly look for MVFR ceilings for KGGW and KOLF. IFR ceilings and
visibilities are expected for KSDY at times and especially KGDV
with snow persisting.


&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 5 AM MST Saturday for Dawson-
Garfield-McCone-Petroleum-Prairie-Southwest Phillips-Wibaux.

&&

$$

weather.gov/glasgow