Avalanche Forecast
Avalanche Bulletin - Little Yoho
Avalanche activity has settled down slightly with the cooler temperatures, and the ski quality is good - dry snow on a supportive crust right down into the trees. We remain concerned about human triggering and are avoiding avalanche starting areas.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Use conservative route selection, choose moderate angled and supported terrain with low consequence.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Up to 20cm is possible by Wed making for a weekly total of 40cm dry snow to be blown into windslabs. We expect these to only be a problem at the higher elevations where they can be easily triggered by skiers in leeward areas.
Travel and Terrain Advice
- Use caution in lee areas. Recent wind loading has created wind slabs.
Avalanche Summary
No avalanches were reported or observed today, but visibility was limited.
Snowpack Summary
Another 10-15cm of new snow overnight on Tues brings to the 5-day dry storm snow amount to 40cm. Moderate winds have been transporting this snow, but windslab formation has been limited in the past 24 hours. The main weakness to watch is the Oct 31 crust/facet layer located about 30cm above the ground which produces easy, planar shear test results.
Weather Forecast
A strong SW flow over the mountains will create favorable conditions for heavy snow along Hwy 93N Icefields Parkway. Snow will continue Tuesday evening over the higher elevations and end near midnight. 10-20cm is possible by Wednesday morning. The heaviest snowfall will be from Sask River Crossing to the southern sections of the Jasper region.
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Although the snowpack is strong, it remains unstable in many alpine/treeline areas. Avoid avalanche starting zone areas. We do not expect natural avalanches on this layer in the next 24-hrs, but human triggering remains a serious concern.