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Avalanche Forecast

Archived

Feb 7th, 2021–Feb 8th, 2021

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

Little Yoho.

Extreme cold temperatures generally act to stabilize the snowpack in the short-term. Over the past 48-hrs we have had three reports of small (< size 2) avalanches on S aspects below treeline. Watch out for this, given people are seeking out the sun.

Weather Forecast

The omega block has settled in and Environment Canada has issued an Extreme Cold Warning for the region, with temperatures reaching -30 on Sunday night and close to -40 on Monday night. This is seriously cold weather, so be prepared with plenty of warm clothing, travel in the sun and keep your trips short. Don't have an accident in this cold!

Snowpack Summary

Previous winds have redistributed the recent 30-60cm of low density storm snow into wind slab in the alpine and exposed areas at tree line. In sheltered areas the recent storm snow remains loose powder. Buried sun crust and facets on steep south aspects. Treeline snow depths range from 150-220cm.

Avalanche Summary

Size 2 windslab reported at treeline on Mt Field today. Also, over the past three days there have been three avalanches up to size 2 reported on south aspects below treeline. Information on these is available on the Mountain Information Network.

Confidence

Due to the number of field observations

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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.