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Avalanche Forecast

Archived

Nov 21st, 2021–Nov 22nd, 2021

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

Strong winds continue on Monday. Wind slabs dominate the landscape.

Confidence

Moderate -

Weather Forecast

Monday will be warm and windy. Temps will climb to -2 by midday with SW winds up to 140km/h at Ridgetop. Very light flurries with minimal accumulations are expected. Tuesday could see 10cm of new snow.

Avalanche Summary

Nothing noted or reported today. 

Snowpack Summary

Up to 4cm of new snow in the past 24 hours, which is quickly being blown away by the intense wind at ridgetop. There is an obvious crust down 20-30cm in the trees below 2100m. 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.