Avalanche Forecast

    Avalanche Forecasts are for use by experienced backcountry travelers in uncontrolled sidecountry and backcountry terrain. These forecasts and conditions do not apply to open, in-bounds terrain at ski resorts, which is subject to avalanche control by local resort ski patrol.

    Avalanche Rating

    High (4)

    Valid Wed Feb 28 4:00pm PST 8 hours ago Until Thu Feb 29 4:00pm PST

    Very dangerous avalanche conditions continue at higher elevations. Avoid all avalanche terrain.

    Natural and human-triggered avalanche activity remains likely.

    More Detail

    To get the complete forecast with additional graphics and details, please view the Avalanche Canada Zone forecast provided by Avalanche Canada .

    Snowpack Discussion

    30 to 70 cm of storm snow overlies wind-affected surfaces and old wind slabs in exposed areas and settling snow in sheltered areas.

    Multiple weak layers exist in the upper and mid snowpack. The most concerning weak layer is a widespread crust down 30 to 100 cmwith a weak layer of facets or isolated surface hoar above this crust. This problematic layering is very concerning with recent large avalanche activity attributed to it. Although natural avalanche activity may taper out on this layer as the snow stops falling it will remain possible to human-trigger it for some time afterward.

    Avalanche Activity

    No new avalanches were reported by 4 pm on Wednesday. Poor visibility and high avalanche danger kept many users out of the backcountry.

    We expect users who head out on Thursday will see evidence of a widespread natural storm slab avalanche cycle that occurred during the storm.

    Several remotely triggered persistent slab avalanches were reported up to size two in the region early this week. This is a clear sign the persistent weak layer is primed for human-triggering.