Snow Avalanche Guidance
Issued by NWS Missoula, MT

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108
FWUS45 KMSO 220247
SAGMSO

Backcountry Forecast for western Montana and north central Idaho
National Weather Service Missoula MT
747 PM MST Tue Nov 21 2017

DISCUSSION:

Special Avalanche Bulletin issued for Flathead Range, Whitefish
Range and Swan Range.
http://www.wrh.noaa.gov/total_forecast/getprod.php?prod=XXXSABMSO

Snow levels are expected to quickly rise with the upcoming warm
weather system. Most of north- central Idaho and northwest /west-
central Montana above 4000-5000 feet are likely to see 0.50"-0.75"
of rain, but higher elevations and favored upslope ranges will
see much more with 1.00"-1.50" common and isolated rain amounts
over 2.00" by Wednesday morning. Temperatures are also likely to
be above freezing beginning today and lasting until the cold front
passage on Thursday.

Very moist air and strong westerly terrain winds will make for
another rain event during Thursday, but snow will return behind
the cold front.


&&
Elevations above 4,000 FT:

                      Today        Tonight      Wed
Cloud Cover           75%          95%          85%
Hi/Lo Temps           33 to 43     31 to 37     41 to 48
Winds(mph)            SW  8G23     SW 15G36     SW 13G32
Precip Chc            80           100          70
Precip Type           sno/rain     rain         rain
Liquid Amt            0.07         0.55         0.18
Snow Ratio(SLR)       11:1         0            0
Snow Amt(in)          0-1          0            0

Snow Level            4500         8500         9500

$$



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