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Avalanche Forecast

Archived

Dec 21st, 2021–Dec 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, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Kananaskis.

The winds have been howling out there! At all elevations bands the winds have changed the snowpack. Tomorrow is the start of a storm and the winds will continue to blow strongly with new snow. The Danger rating may increase with more snow then forecasted.

Confidence

High -

Weather Forecast

Slightly warmer temperatures tomorrow -9 in the Alpine. 6-8cm possible through out the day. The wind will remain strong throughout the storm. The snow will continue in to the evening and all day Wednesday. By Wednesday eve there could be up to 30cm

Avalanche Summary

No new avalanches observed today. However moderate snow transport was observed off the highest of peaks. A party also reported a large cornice failure, surely from wind loading in the Black prince zone.

Snowpack Summary

Wind slabs are being found in Specific locations in open Tree line. The Alpine was heavily wind affected and scoured in proud features. 10-15cm settled snow now sits on top of previous surfaces. Below that the Dec 1st crust is down 70cm and is faceting above the crust. Below that a well settled mid pack exists. Depth hoar was found today in a Snow pit in the alpine in Burstall pass. Height of snow at 2200m was 185cm

Terrain and Travel

  • Fresh wind slabs will likely form throughout the day, diligently watch for changing conditions.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

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.