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Avalanche Forecast

Archived

Jan 29th, 2014–Jan 30th, 2014

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Carefully assess the variability and consequences of the terrain before committing to bigger lines and features.

Weather Forecast

The weather will remain unsettled for the next couple of days as a stationary front slowly moves out of the area. This should bring broken sunshine, a few more cm's of new snow and a general cooling trend; staying cold for the remainder of the week.

Snowpack Summary

Up to 4 cm low density new snow has buried previously formed surface hoar. An overall highly variable snowpack sits on 10-30cm of basal facets. Previous wind slabs are well bonded in the upper snowpack and providing bridging strength over deep weaknesses above tree line and the alpine. Extensive scouring in the high alpine.

Avalanche Summary

No new avalanches observed today.

Confidence

Due to the number of field observations

Problems

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.