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Archived

Avalanche Forecast

Mar 27th, 2021–Mar 28th, 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
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

Regions: Kananaskis.

A warm wet windy storm is coming to the region on Sunday. Avalanche danger will increase with the arrival of this storm. Sunday will be a day to keep watching conditions.  

Confidence

Moderate - Uncertainty is due to the timing of the incoming weather system.

Weather Forecast

20-30cm of snow is forecast by the end of the day on Sunday with strong westerly winds and warm temps. As we move into Sunday evening, temperatures will begin to drop and winds shift out of the north under partly clear skies.

Avalanche Summary

A few cornice collapses were observed but no slabs were found on the underlying slopes. 

Snowpack Summary

Isolated windslabs are being found in alpine areas but only limited reactivity along ridgelines and immediate lees. Tomorrow will be a big change though as winds increase into the strong range with 20-40cm of new snow in alpine areas. Expect windslabs to become more widespread at Alpine and treeline likely failing at the storm snow interface.  

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Closely monitor how the new snow is bonding to the crust.
  • Watch for fresh storm slabs building throughout the day.

Avalanche Problems

Wind Slabs

New snow and strong winds and warm temps will form widespread windslabs in open terrain at treeline and below. Watch the bond with the underlying snow surface.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1 - 2

Storm Slabs

Watch for storm slabs in open areas at treeline and below. 

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Likely

Expected Size: 1.5 - 2.5