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Avalanche Forecast

Archived

Jan 5th, 2022–Jan 6th, 2022

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

The avalanche hazard will start to rise on  Thursday, and peak on Friday as we receive more new snow, rising temperatures, and strong wind!

Weather Forecast

The forecast for Thursday is 15cm of new snow with mod southerly winds and a mild rise in temperature. Another 15 is expected to fall Thursday night into Friday, with strong southerly winds and a significant rise in temperature. On Saturday the snow eases off, with mild flurries, then drying conditions as a high pressure starts to move over us.

Snowpack Summary

~35cm of new storm snow overlies colder facetted snow in sheltered locations. In exposed areas in the Alpine and at Treeline, moderate winds formed soft slabs along ridge crests and unprotected terrain features. The Dec 1 crust is buried 80-130cm, with faceted snow above and below it (especially in shallow areas).

Avalanche Summary

Several avalanches to size 3 were observed in the steep paths of Macdonald and Tupper on Tuesday morning. These were triggered by mod-strong southerly wind. Frequent flyer was reported to have avalanched on Monday night to size 2.5.

Confidence

Due to the number and quality of field observations

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.