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Avalanche Forecast

Archived

Nov 29th, 2023–Nov 30th, 2023

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

Regions

Brazeau, Cirrus-Wilson, Icefields.

If the snow is supportive then dig down and check the strength of the base of the snowpack. Previous wind stiffened snow over a weak base in shallow rocky terrain is the most likely scenario for skier or climber triggered avalanches at this time.

Confidence

Low

Avalanche Summary

No new avalanches observed or reported.

Snowpack Summary

Surface hoar up to 10mm continues to grow in cold overnight temperatures. Exposed areas are heavily wind effected at treeline and above. The snowpack is generally between 25-45cm of snow sitting over a faceted base.

Weather Summary

The Mountain Weather Forecast is available from Avalanche Canada https://avalanche.ca/weather/forecast

A ridge of high pressure continues to maintain dry conditions.

Terrain and Travel Advice

  • Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.

Problems

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.