Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 022055

Area Forecast Discussion
National Weather Service Missoula MT
255 PM MDT TUE SEP 2 2014

.DISCUSSION...A cold front approaching the area from the northwest
will bring significant rain and high elevation snow to Northwest
Montana. The general air mass with this system is relatively dry
for this time of year, but there is enough moisture that the areas
under the center of the system will get half an inch to three
quarters of an inch of precipitation. Higher amounts are possible
along the Continental Divide. Snow levels will fall after midnight
tonight, causing high elevation snow above 6,000 feet, but
especially above 7,000 feet into Wednesday afternoon. A winter
weather advisory has been issued for Glacier National Park as a
result. The rest of Western Montana and central Idaho will get
relatively little precipitation with mainly just cooler

By Thursday morning, many higher elevation valleys will be
freezing, with frost likely and a freeze possible in the
Flathead, Mission, Missoula, and Bitterroot valleys. Right now
guidance is oddly warm for Thursday and Friday mornings, but this
is typical with low temperatures forecast about 10 degrees below
average. Frost, freeze, and the morning temperatures overall will
be strongly dependent on cloud cover. And with this system being
relatively dry in most areas went on the cold side of the

Beyond Wednesday and Thursday morning northwest flow will keep the
area under partly cloudy skies with near normal temperatures and
breezy afternoons.


.AVIATION...Expect increasing cloud cover and showers developing
in northwest Montana tonight behind a cold front. The air mass is
relatively dry with this front, but the main focus of moisture and
forcing is over northwestern Montana mainly affecting the area
around KGPI after 03Z. Elsewhere, just expect increasing clouds.


MT...WINTER WEATHER ADVISORY from 3 AM to 9 PM MDT Wednesday for
     Glacier National Park west of the Continental Divide IN THE
     Flathead/Glacier Park...West Glacier Region.


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