Avalanche forecast

West Slopes Central

Northwest Avalanche Center
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Avalanche danger

Wed
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Out of date — this forecast expired 6 years ago. You’re viewing past conditions, not the current bulletin.

Highlights

Chances of you triggering an avalanche remain likely as snowfall and wind continues through Tuesday.  Travel carefully, avoiding all slopes steeper than 35 degrees, and consider staying away from the runout beneath steep slopes as well.  At lower elevations variable icy surfaces are present, as well as downed trees and branches, making for challenging conditions. 

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2

    Numerous natural and human triggered avalanches occurred in neighboring zones in the last few days. Some avalanches are failing within the new snow layer, and some are failing on weak snow down to the Jan 24 crust. There are reports of remotely triggered avalanches, and some observers said that the avalanches are propagating further than expected. The most intense period of the storm is behind us, but overnight and through Tuesday up to another inch of water (1 foot of snow) may fall.  This continues to warrant travelling conservatively in the backcountry.

    As you move along feel for changes in the snow, noting when it becomes stiffer and more pillow-like in appearance. Wind loaded slopes are areas that you definitely want to avoid on Tuesday.  Choose terrain less than 35 degrees, and also consider avoiding the terrain beneath those steep slopes as well.  

    A slab avalanche remotely triggered by a snowmobiler in a neighboring zone on Friday.

Avalanche Discussion

Continued periods of snowfall in the past week have made up for the lack of it in the preceding weeks. On Monday the West Central zone received about 6 inches of snow at upper elevations, while some of this may have fallen as rain below approximately 5000ft.  Snow will accumulate once again Monday night, and avalanches will continue as the snowpack adjusts. In the West North zone, multiple natural avalanches reached down to the valley floor where they nearly struck a group of ski tourers (see video below). While the West North zone received more snow than we did in the West Central zone, this is a good reminder to be conscious of the terrain above you. At lower elevations you will still find challenging conditions with open creeks and variable snow surfaces including crusts coated by only a couple inches of snow.  

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

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