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Archived

Avalanche Forecast

Dec 10th, 2021–Dec 11th, 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
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
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

Regions: Kananaskis.

Snow and winds tomorrow will bump up the hazard at all elevations. Be prepared for rapid changes and watch for increasing hazard if snow amounts are more than expected.

Confidence

Low -

Weather Forecast

All forecasts say we will get almost 20cm of snow tomorrow. It looks like steady snow all day with 8cm by noon Saturday, and 20 by Sunday morning. Very high winds will precede the storm and remain more or less constant throughout the day tomorrow. Ridgetop winds will be about 50km/hr and from the SW. As for the temperatures, they will creep up during the day with a high of -6.

Avalanche Summary

Nothing new was noted today. There was some very isolated cracking within the new windslabs, but nothing moved. 

Snowpack Summary

Light snow and moderate SW winds at treeline and above have created new windslabs. So far they are about 15cm thick seem to be bonding well. As expected, the crust disappears around 2150m and feels like it is breaking down slightly. A quick profile at 2100m had it down 30cm and hints of faceting immediately above the crust. 

Terrain and Travel

  • Approach lee and cross-loaded slopes with caution.
  • Be alert to conditions that change with aspect and elevation.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

Avalanche Problems

Wind Slabs

Fresh wind slabs are forming with the moderate ridge top winds. Watch for crossloading and immediate lee slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Deep Persistent Slabs

This will likely be triggered from a thin spot within the snowpack. Watch the transitional areas from thin to thick.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3