Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 020031
AFDMSO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
631 PM MDT WED OCT 1 2014

...SNOW ABOVE 5000 FEET TONIGHT THROUGH THURSDAY MORNING AROUND
GLACIER PARK...

.DISCUSSION...A fast moving system will drop out of Alberta Canada
tonight bringing a shot of cold air, gusty east winds, and snow.
Snow and gusty winds are expected after midnight tonight in the
Glacier NP area south into the Bob Marshalls and begin to taper
off by late morning. Most locations, including Logan and Marias
Passes, can expect anywhere from 2 to 4 inches of snow by noon
tomorrow. The backcountry along the Continental Divide above 6500
feet could see slightly higher amounts. Gusty east winds along
with snowfall and slick snow covered roads will produce reduced
visibility and hazardous driving conditions at times. Locations
down as low as West Glacier and points just west could wake up to
a light dusting of snow, but not expected to create any impacts.

Chilly temperatures will develop Friday morning in the clear and
dry post-frontal atmosphere. Many of the valleys near the Divide
and NW Montana will see temperatures well below freezing and could
be open to some impacts (frozen sprinklers/pipes/hoses, plants,
etc.).

Few, if any additional weather related impacts are anticipated
this weekend with the Northern Rockies ultimately being placed
between two strong weather features: high pressure over the west
coast and a very cold upper level low set to dominate the weather
over the Great Lakes and upper Midwest. Models are hinting that
broad troughing will ultimately overcome the coastal ridge by the
middle of next week. And this could open the door to a mid October
cool down with ample cold air forecast to pool up in Alaska and
far northern Canada. However this possibility is still met with
much uncertainty.

&&

.AVIATION...Gusty west winds will impact all aviation sites in
western Montana this afternoon and evening. Gusts could be as high
as 25 mph at times late this afternoon. Otherwise, cloudy
conditions will obscure mountain tops at times. Expect another
cloudy day tomorrow for western Montana and central Idaho.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...WINTER WEATHER ADVISORY from Midnight tonight to Noon MDT
     Thursday ABOVE 5000 FEET for the West Glacier Region.

ID...None.
&&



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