Avalanche Forecast
Issued: Dec 14th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
Timothy Johnson,
Travel continues to be good on a mostly supportive snowpack. With cold temperatures in the forecast enjoy it while it lasts!
Summary
Weather Forecast
Wednesday
A mix of sun and cloud.
Precipitation: Nil.
Alpine temperature: High -14 C.
Ridge wind southwest: 10-20 km/h.
Freezing level at valley bottom.
Thursday
Cloudy with sunny periods and isolated flurries.
Precipitation: Trace.
Alpine temperature: Low -23 C, High -12 C.
Ridge wind west: 10 km/h.
Freezing level at valley bottom.
Snowpack Summary
Watch out for crossloaded or reverse loaded slopes from northerly winds. Mid snowpack has settled well with a 2cm rain crust present below the recent snow up to 1950m. Another crust near the base of the snowpack continues to promote basal faceting adding to our deep persistent slab concerns
Avalanche Summary
No new activity observed on the Icefields Parkway. Marmot Ski Resort continues to get explosive triggered avalanches to slide on the deep persistent layer
Please consider sharing your trip report, Ice and/or Riding conditions on Avalanche Canada's, Mountain Information Network
Confidence
Problems
Wind Slabs
Watch for crossloaded and reverse loaded slopes from northerly winds. Watch for hollow sounds and cracking. Consider testing smaller slopes before committing to larger features; windslabs could initiate deep layers.
- Use caution in lee areas. Recent wind loading have created wind slabs.
- Watch for stiffer feeling snow. Avoid areas that appear wind loaded.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Deep Persistent Slabs
Triggering this layer would be a high consequence event - cautious decisions and thorough investigation is necessary. More likely to trigger this layer in transitions from thin snowpack to deeper loaded pockets or terrain features.
- Use caution on open slopes and convex rolls
- Use caution in thin snowpack areas.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 15th, 2021 4:00PM
