Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 041019

Area Forecast Discussion
National Weather Service Missoula MT
419 AM MDT FRI SEP 4 2015

...Cold and Wet Labor Day Weekend with High Mountain Snow...

A cold low pressure system continues to dig along the west coast
resulting in chilly conditions, as well as continuous showers for
southwest Montana and the Continental Divide this morning.
Showers are expected to become more widespread across north-
central Idaho and western Montana as the low shifts eastward today
into Saturday. The Clearwater Mountains, southwest Montana, and
the Continental Divide including Glacier NP will see the most
significant precipitation.

As colder air moves into the region late Saturday into Sunday,
snow levels will drop to generally 6500-7500 ft which will bring
snow accumulations to higher terrain during this period. Glacier
NP and the Bob Marshall Wilderness could see the most snowfall
supported by the position of the low and wrap-around moisture.
Those planning outdoor activities during the holiday weekend,
especially for the terrain of northwest Montana, should be
prepared for cold, wet, and raw conditions.

As the aforementioned system exists the area, a weak disturbance
in its wake could bring light showers to mainly western Montana on
Monday. Otherwise, drier northwesterly flow and warmer
temperatures will return for the rest of next week.


.AVIATION...Light showers will continue along Lemhi County,
southwest Montana, and the Continental Divide and will impact
KSMN, KBTM, and KGPI this morning. In addition, low stratus decks
will obscure mountains for KGPI, KBTM and potentially KMSO.
Showers will become more widespread with embedded thunder later
this afternoon for all terminals. Expect ceiling and visibility
reductions in heavier shower development. Light snow is likely for
the high terrain for Glacier NP.



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