THIS AVALANCHE ADVISORY EXPIRED ON February 10, 2018 @ 7:03 am
Avalanche Advisory published on February 9, 2018 @ 7:03 am
Issued by Eric Morgan - Idaho Panhandle Avalanche Center

Kootenai
Selkirks/Cabinets

bottom line

With temperatures mostly above freezing since February 5th in the mountains  most of our precipitation has been rain from 6300 feet down until last night.  The pack has firmed up with about 3-4 inches of snow ontop of an melt freeze icecrust that is more prominent  below 6000 feet.  Extreme upper elevations have a more dense snow surface with lighter powder on top.  

How to read the advisory

Kootenai
Selkirks/Cabinets

How to read the advisory

With temperatures mostly above freezing since February 5th in the mountains  most of our precipitation has been rain from 6300 feet down until last night.  The pack has firmed up with about 3-4 inches of snow ontop of an melt freeze icecrust that is more prominent  below 6000 feet.  Extreme upper elevations have a more dense snow surface with lighter powder on top.  

2. Moderate

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

2. Moderate

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

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: Storm Slab
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Overnight 3" of lighter snow was received in the Selkirk and Cabinet range and about 6" reported a little to the east at Poorman Creek SNOTEL at 5100 feet.  With the temperatures dropping around 10 last night, expect there to be a firm crust with 3-6 ince storm snow ontop.  Keep an eye out for the bond between yesterdays wet surface to last nights snow with the rapid decrease in temperatures and how the bond changes in elevation.  

Avalanche Problem 2: Wind Slab
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Transport speed winds and avaliable snow for transport have created large windslabs on lee terrain in the high elevations.  Wind direction is changing from yesterday becoming NE 11-14, so expect windslabs on multiple aspects

Avalanche Problem 3: Persistent Slab
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There are still crusts and associated weak layers throughout the advisory area that backcountry users need to be mindful of. The only way to be certain they aren't where you are recreating is to dig down into the snowpack and assess at each location.  As they continue to get buried deeper, the probability of triggering becomes less if there is an ice bridge above the layers, but the consequence becomes higher if you hit the sweet spot.

advisory discussion
recent observations

Smaller wet slides on steep rollovers have been observed in the mountains.  The upper wet snow should have locked up pretty tight last night with temperatures down in the low teens most of the night.  Now there is new snow on this crust.  Feel free to send your observations from today's outings.  

Weather and CURRENT CONDITIONS
Weather observations from the Region
0600 temperature: 13 deg. F.
Max. temperature in the last 24 hours: 37 deg. F.
Average wind direction during the last 24 hours: NNW
Average wind speed during the last 24 hours: 10 mph
Maximum wind gust in the last 24 hours: 25 mph
New snowfall in the last 24 hours: 3-6 inches
Total snow depth: 112 inches
Two-Day Mountain Weather Forecast Produced in partnership with the Spokane NWS
For 2000 ft. to 4000 ft.
Friday Friday Night Saturday
Weather: Partly Sunny Clear Sunny
Temperatures: 34 deg. F. 18 deg. F. 33 deg. F.
Wind Direction: N N SW
Wind Speed: 11-13 7-14 6-11
Expected snowfall: 0 in. 0 in. 0 in.
For 4000 ft. to 6000 ft.
Friday Friday Night Saturday
Weather: PARTLY SUNNY CLEAR SUNNY
Temperatures: 21 deg. F. 10 deg. F. 22 deg. F.
Wind Direction: NE N W
Wind Speed: 11-14 7-14 6-11
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.