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Avalanche Forecast

Archived

Dec 10th, 2025–Dec 11th, 2025

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
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, Bow Valley, Highwood Pass, North 40, Spray - KLakes.

Conflicting forecasts will force us all to pay attention to how much snow we actually get, and how that new snow is affecting the snowpack. Hazard ratings could vary from this forecast if we get more or less snow than expected. Continually assess conditions as you travel.

Confidence

Moderate

Avalanche Summary

Nothing today, but visibility was poor.

Snowpack Summary

Continued snow today has brought the storm snow totals to about 20cm at treeline. Alpine winds have been steady in the moderate to strong range and have continued to build wind slabs in lee features. Expect slabs up to 40cm thick in the alpine. and 20-30 at treeline. The new slabs will be sitting on old surfaces and seem to be sticking well. The mid November crust is now down 50-60 on average and is starting to lose its concrete like character.

Weather Summary

Models differ a little bit when it comes to snow amounts. In general we can expect another 9-18cm of snow tonight, stopping in the early morning. Winds will be gusty as the snow tapers. These gusty winds will signal a mild cooling trend with day time temperatures falling to the -10 range. As the cooler air comes in, ridge winds will remain reasonably steady at 30 km/hr and the gusts will subside.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid areas with overhead hazard.
  • Avoid avalanche terrain during periods of heavy snowfall.
  • 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.