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Avalanche Forecast

Archived

Nov 29th, 2022–Nov 30th, 2022

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
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.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

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

Continued snowfall accumulation is bringing with it a high hazard in the alpine.

Be aware of avalanche runouts even at elevations with little snow.

Confidence

High

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

Snow in the last 24 hours dusted the entire island and brought up to 20 cm at high elevations in some places while most of our area received around 8 to 12 cm. In open alpine areas, this new snow is sitting on wind slabs. At higher elevations, the snowpack is at approximately 80 cm. More snow coming today will continue to cover surface roughness but below treeline is expected to remain below the threshold for avalanches for now.

Weather Summary

Tuesday Night

Cloud, 20 - 25 cm accumulation, southerly wind 40 km/h gusting to 65 km/h, -5 C at 1500 m.

Wednesday

Cloudy, 15 to 20 cm accumulation, southwest 20 km/h gusting to 55, alpine temperatures -6 to -10 C at 1500 m.

Thursday

A mix of sun and cloud, trace accumulation, winds south 25 km/h gusting to 50, -5 to -10 C at 1500m with freezing level to sea level.

Friday

Cloudy with sunny periods, 2 to 10 cm accumulation, winds southwest 30 km/h, temperatures -5 to -8 C at 1500 m with freezing levels around 500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Travel in alpine terrain is not recommended.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.