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Archived

Avalanche Forecast

Dec 2nd, 2021–Dec 3rd, 2021
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
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
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.

A wicked, warm, wet storm has changed up the landscape. Dropping temperatures will help lower the hazard.

Weather Forecast

Temperatures are falling and precip is slowing down.

Tonight: Clear, Freeze level 1500m, light / gusting mod SW winds

Fri: Cloudy, FZL Valley Bottom, Alpine low -10*C, light SW winds

Sat: Cloudy with sunny periods, Alpine temp -11*C, light W winds

Sun: Cloudy with flurries, Alpine temp -16*C, light / gusting mod W winds

Snowpack Summary

On Thursday 10 cm of new snow at tree-line has fallen on 10 cm of moist snow. Rain soaked snow below tree-line will start to form a supportive crust by Friday. Below tree-line travel will be challenging has temperatures lower. The mid to lower snowpack is generally rounded and well bonded.

Avalanche Summary

No new natural avalanche observed on Dec 02.

Avalanche control on Dec 01 produced many avalanches up to size 3.5, some reaching valley bottom. Avalanches started moist and ended wet. Natural activity has backed off as the storm leaves the region and temperatures start to cool.

Confidence

Due to the number of field observations

Avalanche Problems

Storm Slabs

New storm slabs are present at tree-line and above. Strong/extreme south-west winds created slabs over 1m thick. Slabs will continue to gain strength has temperatures cool.

  • Be wary of large open slopes that did not previously avalanche.
  • New snow will require several days to settle and stabilize.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Wind Slabs

Watch for wind slabs on lee and cross-loaded features. Strong to extreme winds from the south-west have moved snow.

  • Watch for Wind Slabs low on slopes, and in usually sheltered terrain, due to previous extreme winds.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5