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Archived

Avalanche Forecast

Dec 3rd, 2019–Dec 4th, 2019
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

Avalanche hazard will increase with wind and snow. Pay attention to local conditions as they vary throughout the region.

Weather Forecast

Light flurries (5-10 cm) and strong SW winds forecasted for Wednesday. Day-time highs at tree-line around -1. Slight cooling trend for Thursday with mixed sun and cloud.

Snowpack Summary

5-10 cm of fresh snow (and more expected on Wednesday) accompanied by moderate SW winds have created fresh windslabs in lee alpine terrain. The midpack consists of 25-35 cm of facetted snow overtop of the Nov 8 crust. The lower snowpack consists of facets and depth hoar. Snowpack depths at treeline vary from 60-90 cm with up to 140 cm in lee areas

Avalanche Summary

Reports of newly formed wind slabs isolated to ridge crest have been reactive to explosive control and ski cuts. All observed avalanches were size 1-1.5.

Confidence

Avalanche Problems

Wind Slabs

10-20 cm of recent storm snow accompanied by strong SW winds will have created fresh wind slabs in alpine and tree-line regions.

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2