Avalanche Forecast
Avalanche Bulletin - Little Yoho
New snow and wind will create new windslabs. Mid-pack weak layers are still worrisome.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Avoid open slopes and convex rolls at treeline where buried surface hoar may be preserved.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
New snow and wind are expected to create new windslabs on lee slopes near ridgecrests
Avalanche Summary
Avalanche Control on Mt Dennis on Tuesday showed the facets are still very mobile below treeline. No new avalanches were reported today.
Snowpack Summary
Recent warm temperatures aloft have settled the upper snowpack, with suncrust formed on S and W aspects. 30-50cm of snow sits over the Dec.15 persistent weak layer of facets and surface hoar. We are concerned about this layer at treeline in Little Yoho where the layer is producing easy to moderate snowpack test results and widespread whumphing.
Weather Forecast
New snow and wind are expected Thursday. 15cm of snow is expected, maybe 20cm by Friday. Temperatures are expected to rise Thursday and then fall again Friday
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This layer is a concern mainly at treeline around Field, Emerald Lake and Little Yoho - this is a very specific band. Natural avalanches are unlikely but human triggered are likely - watch overhead hazard BTL; avalanches can run into the forest.