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Avalanche Forecast

Archived

Nov 22nd, 2021–Nov 23rd, 2021

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Kananaskis.

As much as 10cm is on the way Tuesday which will do a lot to improve ski quality. The new snow is probably not enough to increase the danger levels, but keep an eye on localized conditions and be mindful of the soon-to-be-buried wind slabs.

Confidence

Moderate -

Weather Forecast

Tuesday will finally see an end to the extreme winds. Temperatures will reach a high of -6 and as much as 10cm is in the forecast. Another 10cm is possible by Thursday.

Avalanche Summary

Nothing noted or reported today. 

Snowpack Summary

2 to 4cm of new snow in the past 24 hours, which is quickly being blown away by the intense wind at ridgetop. The November crust is down 20-30cm at 2100m and below. Above 2200m the crust gradually turns into wind slabs of varying hardness. Recent north winds have loaded southern slopes near ridges. Expect wind slabs on all aspects except where the wind has scoured down to rock.

Terrain and Travel

  • Approach lee and cross-loaded slopes with caution.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.