Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Minimal avalanche activity has inspired confidence in the snowpack.
Avalanche Problem 1: Deep Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Pay attention to overhead hazards like cornices which could trigger the deep persistent slab.
Avalanche Summary
An older (+48hr) slab avalanche was reported in the Icefields are on a South aspect at 2850 m that started 20 cm deep and then stepped down to a crust 30 cm below. The slope angle was ~40 deg. and the size was 2.5. It was likely a solar trigger avalanche.
Snowpack Summary
There is a well settled snowpack in most locations. Widespread wind effected snow in the alpine with minimal ski penetration. The Halloween, Oct. 31 crust sits in the lower half of the snowpack with faceted crystals above and below; found between 2200 - 2900m.
Weather Forecast
Alpine temperatures will cool as the inversion conditions come to an end. Expecting to see overcast conditions with flurries that might amount to 8 cm by Sunday. Westerly winds will be light but will build on Sunday.
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Heavy loads , like natural cornice releases might trigger this deep instability.