Snow Avalanche Guidance
Issued by NWS Missoula, MT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12
FWUS45 KMSO 131101

Backcountry Forecast for western Montana and north central Idaho
National Weather Service Missoula MT
401 AM MST SAT FEB 13 2016

DISCUSSION: A Pacific cold front has pushed through the Northern
Rockies overnight, dropping the snow level to near 4000ft this
morning. Cold air under the upper level trough passing over the
area today into tonight will keep the snow level between 3500ft and
4500ft. Conditions should remain quite unstable with frequent snow
showers bringing brief bursts of moderate snow and gusty winds
throughout the day.

After a brief lull in the action this evening, a second more
powerful weather system will usher in an `atmospheric river` of
moisture across teh region late Sunday through Monday. This will
lead to gusty conditions in the mountains with periods of heavy
snow possible. The snow level will begin to climb on Monday,
reaching over 6000ft across the area. The combination of
increasingly wet snow, warm air and subsequently rising snow
levels may produce growing avalanche concerns throughout the

Elevations above 4,000 FT:

                      Today        Tonight      SUN
Cloud Cover           90%          90%          90%
Hi/Lo Temps           31 to 41     22 to 30     32 to 43
Winds(mph)            W 17G33      W 17G39      W 18G40
Precip Chc            90           80           70
Precip Type           sno/shr      snow         snow
Liquid Amt            0.15         0.13         0.15
Snow Ratio(SLR)       18:1         14:1         13:1
Snow Amt(in)          2-5          1-3          2-3

Snow Level            4000         3000         3500

$$ is the U.S. government's official web portal to all federal, state and local government web resources and services.