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Avalanche Forecast

Archived

Nov 28th, 2022–Nov 29th, 2022

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

Regions

Vancouver Island, East Island, North Island, South Island, West Island.

Snow coming in Tuesday afternoon will mark the beginning of significant snowfall accumulation.

Early-season hazards are still lurking below the surface.

Confidence

Moderate

Avalanche Summary

Observations are limited at this time of year. No new avalanches have been reported or observed. If you do head into the backcountry consider submitting a MIN report!

Snowpack Summary

Saturday brought 5 to 15 cm of snow. The winds yesterday and today are suspected of transporting this new snow, building wind slabs in open areas. Upper elevation snowpack now stands at 80 cm and is beginning to cover surface roughness. Below treeline is below the threshold for avalanches.

Weather Summary

Monday Night

Cloudy with clear periods, trace accumulation, southwest wind 10 to 20 km/h, alpine temperatures to -9 C with freezing near sea level.

Tuesday

Cloudy, 10 to 15 cm accumulation, ridge winds southwest 30 km/h, alpine temperatures -6 to -10 with freezing near sea level.

Wednesday

Cloudy, 15 to 20 cm accumulation, winds south 25 km/h gusting to 50, alpine temperatures -2 to -7 C with freezing level rising to 800 m.

Thursday

Cloudy, 5 cm accumulation, winds southwest 30 km/h, alpine temperatures around -5 to -8 C with freezing levels going back down to near sea level.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Watch for fresh storm slabs building throughout the day.

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.