Avalanche Forecast
Regions: Banff Yoho Kootenay, East Side 93N, Field, LLSA, Lake Louise, Little Yoho, West Side 93N.
As we transition into winter, we're starting to see the first significant avalanche's of the year. Ice climbers in particular should be mindful of the terrain above their head and below their feet.
Confidence
Low
Avalanche Summary
There have been numerous reports of natural and explosive triggered avalanches up to size 2 within the last 48h in the alpine. Skier controlled avalanches were reported by Sunshine ski hill up to size 1 at tree line. Dry loose avalanches have also been reported by climbing parties.
Snowpack Summary
The recent storm has brought an additional 10-30cm's of new snow to the region. Total snow depth's vary significantly with elevation, the deepest areas being lee features of the alpine where 50-70cm has been reported. There are generations of winds slab within the snowpack, which overlay a very weak base. Wind slabs have failed naturally within the last 48h, up to size 2.
Weather Summary
5-10 cm's of new snow with moderate to strong winds out of the south west are expected tomorrow, with greater snow fall amounts on the 93N. The storm is forecast to arrive through the afternoon, with an alpine high of -3C.
For more info please see the Mountain Weather Forecast.
Terrain and Travel Advice
- Avoid exposure to overhead avalanche terrain during periods of heavy loading from new snow, wind or rain.
- Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
Avalanche Problems
Wind Slabs
Wind slabs exist in lee features of the alpine and tree line. Watch locally for wind and what is hidden below the surface.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 1 - 2.5
Loose Dry
Watch for power sluffing in places with more snow, especially in steep, gully terrain.
Aspects: All aspects.
Elevations: Alpine.
Likelihood: Possible - Likely
Expected Size: 1 - 1.5