Avalanche Forecast
Avalanche Bulletin - Little Yoho
Touchy conditions persist. If avalanches are triggered, expect deep fractures and wide propagations. The better choice is to avoid avalanche terrain.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Avoid all avalanche terrain.
- Watch for whumpfing, hollow sounds, shooting cracks or recent avalanches.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Increased wind from the W-SW has created fresh wind-slabs in lee areas in the alpine. The slabs are up to 100cm thick.
Avalanche Summary
Lake Louise ski area reported triggering a large size 3 avalanche with explosives today. At the very end of the day Visitor Safety responded to a potential involvement on Quartz Ridge. It ended up be a remote triggered size 3 from a recreational party with no involvement.
Snowpack Summary
Storms from the last 9 days have deposited up 100cm of storm snow. The main concern in the snowpack lurks below and continues to be the 3 persistent weak layers of surface hoar and/or facets that are found between 50 and 100cm down. We continue to observe sudden test results, whumphing and large propagations on these layers.
Weather Forecast
The next storm should arrive early Wednesday. By Thursday we could see accumulations of up to 35cm. Moderate wind from the SW and temps near zero will accompany the storm cycle.
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Three weak layers exist in the upper snowpack: Jan 16, Jan 6, and Dec 15. All are a mix of sun crust, surface hoar and facets depending on the aspect and elevation. Natural activity is tapering, but it is still primed for human triggering.