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Archived

Avalanche Forecast

Dec 28th, 2021–Dec 29th, 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
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: Glacier.

I wouldn't be Canadian if I didn't mention the weather...it's cold, eh?

Temper your touring ambitions with conservative decisions and come back safely to the trailhead with plenty of daylight left (and all your digits)!

Weather Forecast

Continuing cold through the rest of the week.

Tonight: Clear. -25*C, light NW winds

Wed: Mix of sun/cloud, trace snow, -23*C, light NW winds

Thurs: Cloudy, -22*C, light W winds

Fri: Mix of sun and cloud, -20*C, light W winds

Snowpack Summary

50cm of cold, faceted snow sits on top of previously faceted surfaces. Pockets of slab can be found at all elevations, especially along ridge-crests, on exposed alpine terrain, and in open features in the trees. The Dec 1 crust is buried approx 70-120cm, with faceting of the snow directly above and below (especially in scoured, shallow areas). 

Avalanche Summary

Minimal natural avalanche activity in the last 24hrs. One size 2.5 avalanche out of Lone Pine (Mt Tupper), failing on the Dec 1 crust, and one sz 2.5 wind slab from both MacD #10 and Mannix in the more recent snow.

Human triggered avalanches are still possible, see MIN reports from 8812 Bowl and Grizzly Couloir.

Confidence

Avalanche Problems

Wind Slabs

Moderate, variable winds have formed slabs on open features at all elevations, including reverse-loading on S and W aspects. If triggered, these slabs could possibly step down to the Dec 1 crust, approx 70-120cm deep.

  • Keep an eye out for reverse loading created by N-NE winds.
  • If triggered the wind slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2.5