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Archived

Avalanche Forecast

Feb 7th, 2021–Feb 8th, 2021
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

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

Avalanche Problems

Wind Slabs

Wind slabs recently formed from variable winds are still a concern, but there have been limited alpine observations over the last 48 hours. We expect the deep freeze to help stabilize this problem over the week.

  • Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Loose Dry

This problem is stabilizing due to the deep freeze, but with the amounts of loose snow around it is still possible to have a sluff gain mass in a steep gully, or on a steep face of soft powder.

  • Be careful of loose dry power sluffing in steep terrain.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5