Avalanche forecast

West Slopes Central

Northwest Avalanche Center
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Avalanche danger

Thu
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
2 · Moderate
Out of date — this forecast expired 7 months ago. You’re viewing past conditions, not the current bulletin.

Highlights

Warm temperatures and sunshine will maintain the threat of wet snow avalanches.  Stay off steep southerly slopes where you can push wet manky snow downhill.  Glide and other shed-style avalanches may occur in isolated areas without warning, so make sure to put space between you and extreme terrain features. 

Avalanche problems

  • Loose Wet

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

    Despite above-freezing temperatures all night long, clearing skies may form a new surface crust on previously wet snow surfaces by Wednesday morning.  However, with another mild day on tap, those surface crusts should not be hard to break down on steep sunny aspects. 

    Pay attention to the snow surface throughout the day as you change aspects and elevations.  A wet loose avalanche on bigger slopes could quickly entrain additional wet snow and take you for a ride far down slope.  Use extra care near terrain traps, like open creeks,  above trees, and cliffs where even a small slide could easily do damage.    

    While the focus should be on steep sunny aspects, use the same caution on any slope you find yourself sinking into wet, manky snow.  Look up - small wet loose avalanches may continue to release below steep sunny rock faces throughout the day.  

    In isolated areas, glide or shed-style avalanche may slide off smooth rock faces or heather slopes. The simplest advice is to put plenty of space between you and the extreme terrain features where these slides are most likely to fail.  Don't travel directly below areas where you see new glide cracks that have opened up over the last few days.

    A handful of recent wet loose avalanches low on the east side of Herman in neighboring West North. 

    On Wednesday, wet loose avalanches are more likely on steep southerly aspects, or anywhere you find yourself sinking into wet manky snow. 

    Photo: Lee Lazzara

Avalanche Discussion

There was a big range of water (unfortunately mostly rain) over the last 2+ days; 5 inches near the Mountain Loop and less than 2" for the west side of Hwy 2.  The White Chuck weather station showed a decrease of about 15" over this time period.   Skies finally cleared Tuesday afternoon, showing rain-affected snow surfaces up to the higher peaks near Index.  In the neighboring West North Zone at about 5000',  water had worked its way down about 1 ft (30cm).  The 1/3 crust was down about 2-3' at this elevation in the Mt Baker backcountry. 

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