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Archived

Avalanche Forecast

Dec 20th, 2020–Dec 21st, 2020
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
4: High
The avalanche danger rating in the alpine will be high
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
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Kananaskis.

Rapidly changing conditions. Avoid avalanche terrain.   

Confidence

Moderate -

Weather Forecast

Snow expected to begin later tonight bringing 3-8cm . Wind will continue thought the night with gust close to 100km. Snow will increase throughout Monday right in to Tuesday evening could bring 20-25cm.

Avalanche Summary

A few natural slab avalanche up to size 2 on all aspects except for west aspects. There were also a few more loose dry from steeper terrain running quite far. 

Snowpack Summary

Up to 25cm of new snow, with very strong winds lee slopes would have much more snow possibly up to 1m. 20-100cm overlying the Dec 8th facet crust interface. Wide spreed wind affect in Alpine in to open tree line features. Caution for reverse loading with the strong North winds. Found soft to hard slabs. 

Terrain and Travel

  • Watch for fresh storm slabs building throughout the day.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Watch for changing conditions today, storm slabs may become increasingly reactive.

Avalanche Problems

Storm Slabs

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

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1.5 - 2.5

Wind Slabs

This is a buried wind slab, 20-60cm down have not seen much activity on this layer but could become reactive with load. Could be more of a crust on South aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1.5 - 2.5

Deep Persistent Slabs

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2.5 - 3.5