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Archived

Avalanche Forecast

Feb 6th, 2020–Feb 7th, 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
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

Regions: Kananaskis.

Been a while since we saw a slide on the basal layers but the consequences of a large slide are always in our minds. The region needs 10-15cm for a re-set which may come this weekend. Watch from hard windslabs in alpine terrain.  

Confidence

Moderate -

Weather Forecast

Not much for new snow in the forecast for the next few days. Temps will be around -8C with winds out of the SW. Expect a sky consisting of a mix of sun and cloud.  

Avalanche Summary

No new avalanches observed today.

Snowpack Summary

Widespread wind slabs of varying thicknesses in the Alpine and open areas at Treeline. 5 to 10cm of recent snow overlies a thick and supportive rain crust at lower elevations. This crust disappears at 2050m. Look to sheltered areas between 2300 and 2000m for soft snow and good skiing. The wind slabs in the alpine still need some time to heal.  

Terrain and Travel

  • Avoid lee and cross loaded slopes in the alpine.
  • Be careful as you transition into wind affected terrain.
  • Be aware of the potential for large avalanches due to the presence of a deep persistent slab.

Avalanche Problems

Wind Slabs

Wind slabs of varying density are everywhere at upper elevations and range in thickness from 10 to 50cm. Human triggering is most likely in steep, convex and/or unsupported terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 3

Deep Persistent Slabs

This is the bottom 40cm of the snow pack (November crust/facet combo). There is potential for a surface wind slab to step down to this weak layer creating a very large slide.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3.5