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Archived

Avalanche Forecast

Jan 18th, 2025–Jan 19th, 2025
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
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, Banff Yoho Kootenay, East Side 93N, Field, Kootenay, LLSA, Lake Louise, Sunshine, West Side 93N.

We’ve removed the deep persistent problem from the forecast region due to a lack of recent avalanche activity. The layer still exists in the snowpack (see snowpack summary) and could be reintroduced as a problem in the future.

Confidence

Moderate

Avalanche Summary

Minimal natural avalanche activity was observed during a flight across the forecast region on Friday. Avalanche control Friday triggered very few slab avalanches, with no failures on the deep persistent problem. The majority of results were loose dry avalanches, which entrained the faceted snowpack and ran far down the paths.

Snowpack Summary

Recent strong winds and new snow have formed wind slabs on lee slopes in the alpine and at treeline. At treeline, the mid-pack consists of facets over the October crust and depth hoar at the bottom. Snow depths at treeline range from 60-100 cm.

Weather Summary

An Arctic air mass has settled over the region, with forecasted low temperatures dropping to -25°C on Saturday night. Clear skies and light to moderate northerly winds are expected on Sunday.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Avalanche Problems

Wind Slabs

Strong to extreme winds with light flurries on Thursday formed wind slabs 10-30 cm thick in alpine and treeline lees. There is some uncertainty whether this problem is still a concern at treeline elevations.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2