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Archived

Avalanche Forecast

Mar 12th, 2020–Mar 13th, 2020
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
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
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
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.

Pay attention to wind slabs and reverse loading as you approach tree line. Good skiing can be found in sheltered areas.

Confidence

Moderate -

Weather Forecast

Cold and East winds are coming. Friday is forecast to have a high of -17c along with 5cm of snow. With the easterly winds, be on the lookout for some reverse loading. The weather models are not all in agreement with snowfall amounts for Friday and the weekend, so let's hope for more.

Avalanche Summary

No new avalanches were observed.

Snowpack Summary

Widespread buried wind slabs in the alpine and parts of treeline are found under the 10cm of snow that fell Tuesday. There are several generations of wind slabs and it is taking some time for them to consolidate into one layer. Expect some areas of surface sun crust on steep solar aspects, particularly at lower elevations. Cornices are large right now and should be given respect.

Terrain and Travel

  • Be aware of highly variable recent wind loading patterns.
  • Avoid lee and cross-loaded terrain.
  • Extra caution is needed around cornices under the current conditions.
  • Be aware of the potential for large avalanches due to the presence of a deep persistent slab.

Avalanche Problems

Wind Slabs

Yet another generation of wind slabs has been recently formed. These are everywhere in the Alpine and extend down into Treeline. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1.5 - 3

Deep Persistent Slabs

Still concern for the weak layer deep in the snowpack. Triggering is more concerning in shallow snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 1.5 - 3