Snow Avalanche Guidance
Issued by NWS Missoula, MT

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000
FWUS45 KMSO 171055
SAGMSO

Backcountry Forecast for western Montana and north central Idaho
National Weather Service Missoula MT
355 AM MST Sun Dec 17 2017

...Prolonged mountain snow above 5000 feet through mid-week...

DISCUSSION: A weather system will move into the region bringing
increasing mountain snowfall and ridge-top winds gusting over 50
mph at times by Monday morning. Snow levels will gradually rise to
around 4000 feet on Monday with lower elevations transitioning to
rain. A secondary push of moisture arrives Monday night
continuing into Tuesday with further warming and increasing snow
levels to near 5000 feet. There is the potential for heavy
snowfall in the Cabinet mountains and Glacier National Park
Tuesday into Wednesday. A Canadian cold front brings much colder
temperatures and lowers snow levels to valley floors during the
day Wednesday.


&&
Elevations above 4,000 FT:

                      Today        Tonight      Mon
Cloud Cover           85%          90%          95%
Hi/Lo Temps           22 to 31     20 to 26     27 to 37
Winds(mph)            W 14G33      SW 23G60     W 23G57
Precip Chc            50           90           80
Precip Type           sno/shr      snow         sno/fzra
Liquid Amt            0.08         0.27         0.32
Snow Ratio(SLR)       16:1         15:1         15:1
Snow Amt(in)          1-3          3-7          4-9

Snow Level            1000         2500         3500

$$


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