Avalanche Forecast

Issued: Jan 23rd, 2022 3:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs and Persistent Slabs.

Avalanche Canada Dvonk, Avalanche Canada

The winds are relentless! Out today we had gusts well over 100km/h. The skiing has suffered because of that. We found a couple good turns in Sheltered tree line and below forested features

Summary

Confidence

Moderate -

Weather Forecast

Tomorrow a slight change with the potential for some flurries, Up to 5cm. The winds are forecasted to be light out of the NW and overall a cloudy day that is clearing in the evening. Temps will hover around -10

Avalanche Summary

Forecasters did the purple knob traverse today. Conditions were as bad as some of the forecasters with 15+ years have ever seen it! Wind slabs that were cracking, but not moving. Sastrugi that will catch your ski tips, and the ski line stripped down to rock in many locations.

No new avalanches observed or reported today.

Yesterday a good MIN was posted that highlights the early season weak layers (Basal weakness) waking up in a very thin cross loaded feature.

 

Snowpack Summary

Moist snow on some solar aspects (that will be frozen into a crust Monday morning), but this was limited somewhat by wind and occasional clouds on Sunday. Widespread wind effect and wind slabs in the alpine and open areas at treeline. In sheltered locations up to 15cm of lower density snow overlies previous surfaces, which gives acceptable skiing. The Dec crust layer down 100 to 140cm is faceting and produces moderate to hard shears. Forecasters continue to keep a close eye on this persistent weak layer, despite a long spell of minimal activity associated with it. If/when it re-awakens, large avalanches are possible.

Terrain and Travel

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Be aware that wet activity at low elevations is a classic situation for step-down failures in deeply buried persistent weak layers.
  • Be aware of the potential for large avalanches due to the presence of a persistent slab.
  • Watch for areas of hard wind slab on alpine features.

Problems

Wind Slabs

An icon showing Wind Slabs

The buried wind slab will be hard to trigger but if you are able to get it to go from a thin area, it could produce a large avalanche. Thin wind slabs are also being found along ridgelines. At treeline these slabs may step down to the December crust. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Persistent Slabs

An icon showing Persistent Slabs

This problem primarily exists below 2200m. Dig and evaluate.  

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood

Possible

Expected Size

1.5 - 3

Valid until: Jan 24th, 2022 3:00PM