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Avalanche Forecast

Archived

Nov 11th, 2020–Nov 12th, 2020

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

Regions

Kananaskis.

Despite the recent snow we still need a bit more to provide good skiing and coverage. Lots of rocks, stumps, trees below 2100m making skiing sporty. Watch for windslabs in the alpine. 

Confidence

Moderate -

Weather Forecast

No new snow is in the forecast for the next few days and cool temperatures are forecast to persist. Winds will increase slightly into the moderate range later in the day on Thursday so we can expect to see some of this recent snow moving around and forming new windslabs in alpine areas. 

Avalanche Summary

A few loose dry avalanches that ran down into skiable terrain up to sz 1. 

Snowpack Summary

5cm of additional snow gives up 15cm in the past few days. This snow is low density and is overlying windslabs, and rocks in many areas. The November crust is down 20-30cm and on Wednesday was found up to 2500m. This crust was 5cm thick and while is does carry most places, it is a bit punchy on occasion also making for some fast yet sporty skiing. Drummy windslabs were found along ridgelines and in gullied features that made us choose a different route up. Down low, rocks, stumps, trees make the thought a fall or small avalanche ride scary. Its early, ski slow and lightly....

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid slopes that sound hollow or drum-like.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

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.