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Archived

Avalanche Forecast

Dec 27th, 2020–Dec 28th, 2020
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
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
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.

Despite the drop in danger levels, cautious terrain selection is still in order. Wind slabs are highly variable, and could surprise a rider in steep terrain or lee loaded gully.

Confidence

High -

Weather Forecast

 Monday will be a mix of sun and cloud with light to moderate SW winds at ridgetop. A cool morning will warm to near -7 by early afternoon. Most forecasts indicate that there is no new snow expected, but at least one model indicates occasional light flurries through the day.

Avalanche Summary

Nothing new observed today.

Snowpack Summary

2 to 3cm of new snow overnight, adds to the 5cm that fell yesterday. Alpine areas are significantly affected by wind, with widespread wind slabs present. These are now somewhat disguised by the recent snow. The depth and character of these slabs is highly variable. Dig down and evaluate the recent interface before entering a line. The November crust layer has been active in a few recent avalanches which indicates it's potential if overloaded. This layer is also highly variable in character, and will be on our minds for some time to come.

Terrain and Travel

  • Avoid areas where the snow feels stiff and/or slabby.
  • Avoid convexities, steep unsupported terrain and rocky outcroppings.
  • Avoid lee and cross-loaded terrain.
  • Be especially cautious as you transition into wind affected terrain.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.

Avalanche Problems

Wind Slabs

Wind slabs (now buried by up to 10cm of recent snow) are widespread. In steep and unsupported terrain, they could be sensitive to human triggering.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 2.5

Deep Persistent Slabs

Recent avalanches have stepped down to this layer triggerring large avalanches. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3.5