Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 220259

Area Forecast Discussion
National Weather Service Glasgow MT
759 PM MST Mon Jan 21 2019


Update: Except for isolated snow showers near Fort Peck Lake NW of
Jordan, snow has diminished this evening and the Winter Weather
Advisory has expired. Updated forecast earlier when advisory
expired. Low clouds will move into the forecast area overnight as
a shortwave trough moves through the forecast area. Going
forecast has a good handle on this at this time.

Previous short term:
Very active day for western and continuing for the southern zones
this afternoon as upper flow is from the SW but disturbances in
the lower levels are moving in from the NW. Snow with the latest
system is winding down over the western zones but there remains a
lot of fog and the roads are messy, so will leave Winter Weather
Advisory going till 6 pm, similar conditions exist for Garfield
county while heavier snow is to the south and moving east toward
the Dakotas.

Benign conditions occur through Tuesday Night, but the upper
trough will dig over central Canada sending an arctic front
south through the area Wednesday. Any snow should mainly fall west
and south the CWA Wednesday and Wednesday Night. Winds will
increase behind the passage and temperatures will drop below
normal levels Wednesday Night.

Thereafter, the mean upper trough will be over the Great Lakes
with a ridge along the West coast, putting the area under a NW
flow. Small disturbances will move down bringing small chances of
snow. Temps return above normal levels Friday as the brunt of the
arctic air pour into the eastern United States. TFJ


VFR early, then MVFR overnight with low clouds.

Mid level clouds early this evening will be replaced by MVFR
level low clouds with ceilings 1000 to 1500 feet AGL in the late
evening. The low clouds will gradually clear during the day on
Tuesday and VFR conditions will return.

Winds will be NW about 10 kts overnight and become light and
variable on Tuesday.




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