THIS AVALANCHE ADVISORY EXPIRED ON March 17, 2018 @ 5:40 am
Avalanche Advisory published on March 16, 2018 @ 5:40 am
Issued by Eric Morgan - Idaho Panhandle Avalanche Center

Selkirks/Cabinets

bottom line

Consolidated snowpack with firm sun and raincrust with 1 inch of heavy snow on the surface.  Watch for cornice releases which have been the triggers for recent avalanches.  

How to read the advisory

Selkirks/Cabinets

How to read the advisory

Consolidated snowpack with firm sun and raincrust with 1 inch of heavy snow on the surface.  Watch for cornice releases which have been the triggers for recent avalanches.  

2. Moderate

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Above Treeline
Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

1. Low

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Near Treeline
Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

1. Low

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Below Treeline
Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
    Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
Avalanche Problem 1: Persistent Slab
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We observed a recent slide that went on the MLK crust layer triggered by cornice fall.  We have numerous deep layer instabilities which will become more of an issue as we get into spring weather.  With temperatures freezing at night the pack is tightening up.  Assess the solar radiation today on the pack in your travels.

Avalanche Problem 2: Cornice
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Some our recent avalanche activity observed have likely been caused by cornices with the sunny and warm weather last weekend and the earlier part of the week.  Today looks to be another sunny day with above freezing temperatures on a pack that has gathered a bit of moisture from this weeks precipitation, things should be locked up from 22 degree temperatures overnight, just a heads up for clear sun on the upper pack.  We are looking good with freezing temperatures overnight.

recent observations

In the Selkirks we sledded up to Jeru and found a consolidated snowpack with 10 feet of snow.  On an East aspect near the top of Jeru you can see a pretty significant recent avalanche that went on the MLK crust atleast 5 feet deep.  Our best guess is that it was caused by cornice failure from last weeks warm and sunny weather on a well built cornice.  There have been a few others reported in the same time frame just south in the selkirks.  This could be a huge issue as we get into spring, for now enjoy the freeze thaw cycle and look forward to corn.

Weather and CURRENT CONDITIONS
weather summary

Weather observations from the Region
0600 temperature: 22 deg. F.
Max. temperature in the last 24 hours: 27 deg. F.
Average wind direction during the last 24 hours: 0
Average wind speed during the last 24 hours: 5-10 mph
Maximum wind gust in the last 24 hours: 33 mph
New snowfall in the last 24 hours: 1 inches
Total snow depth: 140 inches
Two-Day Mountain Weather Forecast Produced in partnership with the Spokane NWS
For 2000 ft. to 4000 ft.
Friday Friday Night Saturday
Weather: Becoming sunny Clear Mostly sunny
Temperatures: 49 deg. F. 33 deg. F. 49 deg. F.
Wind Direction: Northeast Northeast Northeast
Wind Speed: 7 7 9
Expected snowfall: 0 in. 0 in. 0 in.
For 4000 ft. to 6000 ft.
Friday Friday Night Saturday
Weather: Becoming sunny Clear Mostly sunny
Temperatures: 37 deg. F. 24 deg. F. 37 deg. F.
Wind Direction: Northeast Northeast Northeast
Wind Speed: 7 10 11
Expected snowfall: 0 in. 0 in. 0 in.
Disclaimer

Avalanche conditions change for better or worse continually. Backcountry travelers should be prepared to assess current conditions for themselves, plan their routes of travel accordingly, and never travel alone. Backcountry travelers can reduce their exposure to avalanche hazards by utilizing timbered trails and ridge routes and by avoiding open and exposed terrain with slope angles of 30 degrees or more. Backcountry travelers should carry the necessary avalanche rescue equipment such as a shovel, avalanche probe or probe ski poles, a rescue beacon and a well-equipped first aid kit.  For a recorded version of the Avalanche Advisory call (208)765-7323.