THIS AVALANCHE ADVISORY EXPIRED ON February 14, 2018 @ 6:59 am
Avalanche Advisory published on February 13, 2018 @ 6:59 am
Issued by Melissa Hendrickson - Idaho Panhandle Avalanche Center

St. Regis Basin/Silver Valley

bottom line

The cold front that has swept through the region has done a good job of locking up the snowpack and increasing stability.  The gusty winds we've been having created isolated windslabs on leeward aspects near our ridgelines.  Heads up for the new storm coming in starting tonight, with the potential for over a foot of new snow to fall on a potentially slick bed surface.  

How to read the advisory

St. Regis Basin/Silver Valley

How to read the advisory

The cold front that has swept through the region has done a good job of locking up the snowpack and increasing stability.  The gusty winds we've been having created isolated windslabs on leeward aspects near our ridgelines.  Heads up for the new storm coming in starting tonight, with the potential for over a foot of new snow to fall on a potentially slick bed surface.  

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: Wind Slab
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We recieved 1 to 3" across the region that is resting on the stout rain crust from last weeks warm cycle. Gusty winds associated with the cold front have created windslabs where there was snow avaliable to be transported.  

Avalanche Problem 2: Persistent Slab
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Evidence of our persistent weak layers is getting harder and harder to find, especially after last weeks deluge.  They will be stubborn to trigger in tests, but be mindfull of terrain with shallow trigger points. I'd appreciate observations if you are still finding these in your skiing and riding locations.

recent observations

We've been in the most stable period that we've seen for a while this winter, with unfortunately sporty backcountry sliding and riding conditions.  The rain and warm weather we had last week served to saturate the pack, and the subsequent cold front locked it back up.  This unfortunatley left a very smooth sliding surface in many locations, for both skis/boards and new snow.  Something to be very mindfull of as the new storm moves in this week.  

A big thank you to everyone who participated in the Silver Mountain Backcountry Weekend and last nights fundraiser at the Coeur d'Alene Bike Co.  It's great to be part of this community!

Weather and CURRENT CONDITIONS
Weather observations from the Region
0600 temperature: 10 deg. F.
Max. temperature in the last 24 hours: 14 deg. F.
Average wind direction during the last 24 hours: ESE
Average wind speed during the last 24 hours: 8 mph
Maximum wind gust in the last 24 hours: 21 mph
New snowfall in the last 24 hours: 0 inches
Total snow depth: 59 inches
Two-Day Mountain Weather Forecast Produced in partnership with the Spokane NWS
For 2000 ft. to 4000 ft.
Tuesday Tuesday Night Wednesday
Weather: Increasing clouds Heavy snow Heavy snow
Temperatures: 34 deg. F. 28 deg. F. 29 and falling deg. F.
Wind Direction: S SW W
Wind Speed: 5-7 7-9 7-9
Expected snowfall: 0 in. 3-5 in. 3-7 in.
For 4000 ft. to 6000 ft.
Tuesday Tuesday Night Wednesday
Weather: Sunny Heavy snow and breezy Heavy snow
Temperatures: 28 deg. F. 26 deg. F. 23 and falling deg. F.
Wind Direction: SW SW SW
Wind Speed: 9-14 17-21 (G29) 9-14
Expected snowfall: 0 in. 3-5 in. 4-8 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.