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Archived

Avalanche Forecast

Dec 8th, 2021–Dec 9th, 2021
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Strong winds and new snow formed fresh wind slabs. Expect loose dry avalanches in steep unsupported terrain.

Weather Forecast

Flurries for Wednesday evening with cooling temperatures and gusty winds from the SW. On Thursday the flurries continue with accumulations up to 5cm, continued cold temperatures, and strong winds. More of the same can be expected until Friday night into Saturday, when the next weather system is upon us, dropping another foot of new snow.

Snowpack Summary

Strong southerly winds and approximately 25cm of new snow at TL have built fresh soft slabs in exposed terrain features. The Dec 1st rain crust is roughly 20cm thick, buried approximately 40cm at 1300m, 60cm at TL, and has been reported to 2300m. The snowpack below the December 1st crust is strong, rounded, and still moist in places.

Avalanche Summary

Today in the Highway corridor we observed several avalanches up to size 3. The majority of the larger avalanches were in very steep terrain off of Mount Macdonald and Mount Tupper. No new reports from the backcountry as of 15:00 on Wednesday; however, it is definitely possible for skiers to trigger soft slabs and loose dry avalanches today.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Recent strong winds and new snow formed soft slabs in the Alp and exposed features at TL. Avalanches will be most prominent on lee slopes and in cross-loaded terrain features.

  • Use caution above cliffs and terrain traps where small slab avalanches may have severe consequences.
  • Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Loose Dry

20-30cm of new low-density snow fell in the last 24 hours. Expect sluffing/loose dry avalanches in steep unsupported terrain features.

  • Be careful of loose dry sluffing in steep, confined or exposed terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2