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Archived

Avalanche Forecast

Feb 15th, 2020–Feb 16th, 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
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

Continued inputs of snow and wind over the last few days have built wind slabs and further developed cornices.

Weather Forecast

The west winds will diminish Sunday to moderate values in the alpine and should stay in that range over the next few days. Light flurries will also continue with alpine temps trending a bit down to -20 values until some expected warming and clearing on Tuesday. 

Snowpack Summary

Up to 35cm of snow over the last few days has been redistributed by moderate to strong west winds TL and above. This sits over top of a well settled mid-pack. In much of this deeper snowpack region, the lower snow-pack is well settled and displays no significant shears. Shallower snowpack areas will likely have more pronounced basal facets.

Avalanche Summary

The ski-hills worked with a fresh round of wind slabs again today (the same for almost a week straight): small soft slabs up to 40 deep with a few natural cornice falls triggering small slabs. Sunshine Village staff triggered a sz 3, to ground, on the south side of Lookout Mountain: "The Megaldon", with explosives.

Confidence

Avalanche Problems

Wind Slabs

Wind effect and slab development can be anticipated as you climb above the trees. Extensive wind effect with hard slab development can be expected in the alpine.

  • Use caution on steep lee and cross-loaded slopes

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Deep Persistent Slabs

The mid and lower snowpack is generally strong in this region. Concern still exists for shallower areas especially in the alpine where basal facets may exist. We have limited alpine observations to know if this is a problem or not.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3