Snow Avalanche Guidance
Issued by NWS Missoula, MT

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FWUS45 KMSO 220949

Backcountry Forecast for western Montana and north central Idaho
National Weather Service Missoula MT
349 AM MDT Thu Mar 22 2018

DISCUSSION: Showers will become more widespread today in warm
southwest flow, leading to rising snow levels above 6000 feet and
locally heavy bursts of rain/graupel. A few lightning strikes will
also be possible this afternoon and evening. Tonight, an
approaching cold front will move from west to east through central
Idaho and western Montana, and will be associated with strong
gusty winds of 30-40 mph, rapidly lowering snow levels, and colder
temperatures by Friday morning. Therefore, rain is expected to
change over to snow as snow levels lower below 3000 feet by early
Friday morning.

On Friday, lingering showers will be possible under an unstable
and moist atmosphere. Another cold front with gusty west winds and
increased snow showers is anticipated to move through on
Saturday. A warmer and drier trend is forecast for early next

Elevations above 4,000 FT:

                      Today        Tonight      Fri
Cloud Cover           95%          85%          45%
Hi/Lo Temps           39 to 50     17 to 25     30 to 44
Winds(mph)            SE 11G31     SW 16G39     SW 17G39
Precip Chc            70           100          30
Precip Type           showers      tstms        sno/shr
Liquid Amt            0.08         0.26         0.01
Snow Ratio(SLR)       9:1          14:1         17:1
Snow Amt(in)          0-1          1-3          0

Snow Level            6000         5000         2000

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