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Avalanche Forecast

Archived

Feb 10th, 2021–Feb 11th, 2021

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

Regions

Banff Yoho Kootenay.

While conditions are generally improving (despite the cold temps) forecasters seem to receive a report of a random large avalanche every couple of days. Uncertainty remains so keep this on your mind when making decisions.

Weather Forecast

Thursday still appears to be the coldest day, and then a slow climb back to what is reasonable. Still chilly. The wind will remain in the moderate range from the West and creep into high early on Friday. It will remain relatively clear on Thurs and Fri.

Snowpack Summary

Previous winds from all directions have redistributed the recent 30-60cm of low density storm snow into wind slab in the alpine. In sheltered areas, the latest storm snow remains somewhat low density. Buried sun crust and facets on steep south aspects. Treeline snow depths range from 150-220cm.

Avalanche Summary

Lake Louise ski patrol reported seeing a size 2.5 avalanche below the Sickle on Mt. Victoria. Details were hard to observe but the fracture line looked to be about 100cm deep. Also of note, last week there were three avalanches up to size 1.5 reported on south aspects below treeline.

Confidence

Wind speed and direction is uncertain on Saturday

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.