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000
FXUS65 KGGW 180831
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
231 AM MDT Thu Apr 18 2024

.DISCUSSION...

KEY MESSAGES:

1) A colder and more active weather pattern looks to continue
into the early weekend. Up to an inch of snowfall is possible
along the Canadian border today and tonight.

2) Northwest winds will continue at 20 to 35 mph with gusts to 45
mph at times through this evening.

3) Warmer weather conditions look to move into the area next
week.

WEATHER PATTERN OVERVIEW:

An upper level low pressure system will be over southern
Saskatchewan and Manitoba today. The low will move into western
Ontario on Friday. Unstable conditions will continue on the
southern edge of this system with continuing snow showers at times
expected near the Canadian border. NBM continues to show 40 to 50
percent probabilities for up to an inch of snow near Opheim
through Friday morning. Meanwhile, northwest winds between 20 and
35 mph, gusting to 45 mph will continue to through Thursday
evening. Thus, a Lake Wind Advisory remains in effect for Fort
Peck Lake until 9 PM this evening. Friday will still be breezy
with the strongest winds in the east. Surface high Friday night
will allow surface winds to diminish. A a shallow upper level
ridge ahead of the next shortwave will allow for a warm up on
Sunday, perhaps extending into early next week.


CONFIDENCE AND POTENTIAL DEVIATIONS FROM BASE FORECAST:

High confidence exists on strong and gusty northwest winds
continuing into this evening along with scattered snow showers at
times. Medium confidence continues on the next system late this
weekend into early next week. Unstable conditions will likely be
in place but timing and placing any specific precipitation chances
will be a challenge, and so have opted to remain close to NBM at
this time in collaboration with neighboring offices.



&&

.AVIATION...

LAST UPDATED: 0800Z

FLIGHT CAT RANGE: VFR to MVFR.

DISCUSSION: An upper level low over southern Saskatchewan will
continue to bring low stratus clouds that will vary from low VFR
to MVFR in ceiling heights today and tonight. Isolated snow
showers could reduce visibilities at times.

WIND: NW winds 15 to 25 kts early will increase to 20 to 30 kts
with gusts to 35 kts this morning. NW winds will diminish to 10 to
15 knots tonight.


&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory until 9 PM MDT this evening for Central and
Southeast Phillips-Central and Southern Valley-Garfield-McCone-
Petroleum.

&&

$$

weather.gov/glasgow