521
FXUS65 KGGW 140307
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
907 PM MDT Sun Apr 13 2025

.DISCUSSION...

KEY MESSAGES:
* A strong storm system will remain over northeast Montana today,
  bringing lots of rain, and some snow, in the northeast with
  strong winds.

* Strong winds gusts to near 60 mph will gradually diminish this
  afternoon, so the High Wind and Blizzard warning will be
  canceled here shortly for Petroleum county. Strong winds will
  also diminish area wide.

* Warm and dry conditions resume Monday/Tuesday with another upper
  trough bringing rain and showers on Wednesday/Thursday.


WEATHER PATTERN OVERVIEW:
Rain and snow showers continue across the area as a strong surface
continues churning southward. This system will eventually push
south of the region by tomorrow morning, but a reinforcing
shortwave trough may help aid in producing scattered snow showers
through the morning, especially along the Montana and North Dakota
border. As the strong winds diminish this evening, the Lake Wind
Advisory will eventually be canceled around 10 PM.

Storm system pulls out Sunday Night with temperatures gradually
warming into Tuesday. In fact Tuesday looks to be the warmest day
of all seven with highs in the 60s and 70s.

The next upper trough moves in for unsettled conditions starting
Wednesday as an upper trough drops south through central Montana and
parts of northeast Montana. Cooler temperatures with rain and snow
is expected with this disturbance, but low confidence remains on
precipitation amounts and location.


FORECAST CONFIDENCE & DEVIATIONS:
High confidence in the strong northwest winds diminishing late
this evening. There is moderate confidence in forecast
precipitation amounts through tomorrow morning. Moderate
confidence in snowfall accumulation across the far north and
Little Rockies through tomorrow morning. The main deviation was
bringing temperatures down in the north to force snow accumulation
through tonight.

&&
.AVIATION...

LAST UPDATED: 0230Z

FLIGHT CAT RANGE: MVFR - VFR.

DISCUSSION: Rain showers will exit the TAF sites to the east
before midnight. There is high confidence in all VFR ceilings
after 06Z with clear skies by 18Z Monday.

SFC WIND: NW 10 to 15 Gusting 25 knots this evening. Becoming W to
NW and decreasing to 5 to 15 knots Monday morning through the
rest of the day. The decreasing to light and variable Monday
evening.

GAH


&&

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


&&

$$

weather.gov/glasgow