Avalanche Forecast
Issued: Dec 12th, 2021 4:06PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs, Loose Dry and Deep Persistent Slabs.
Garth Lemke,
Fresh windslab development at upper elevations warrants caution as the new snow continues to settle. Great skiing can be found in sheltered areas at tree line and below.
Summary
Weather Forecast
Tonight- Isolated flurries with trace precipitation. Alpine temp low -14 C. Wind S 15-30 km/h
Mon- Cloudy with sunny periods & isolated flurries. Trace precipitation. Alpine high -10 C. Wind SE 10-30 km/h
Tues- Flurries. Alpine temp low -17. Light ridge wind
Wed- A mix of sun & cloud. No Precipitation. Alpine temperature low -18. Wind W 10-25 km/h
Snowpack Summary
30cm of new snow in the past 36h with moderate SW wind has created new windslab near ridge top & in exposed terrain above treeline. Mid snowpack has settled well with a weak rain crust present below the recent snow upto 1800m. 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 icelfields parkway today with limited alpine visibility.
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Confidence
Problems
Wind Slabs
New snow and moderate to strong SW winds building new windslab in lee and crossloaded features. 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: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Dry
Heavy down flow observed in the Wilson region. Ice Climbers, avoid all overhead exposure.
- Sluffs will be easy to trigger in steep terrain that is sheltered from the wind
Aspects: All aspects.
Elevations: Alpine, Treeline.
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 13th, 2021 4:00PM
