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Avalanche Forecast

Archived

Nov 21st, 2024–Nov 22nd, 2024

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

Regions

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

Stormy weather has created hazardous avalanche conditions at higher elevations. Adopt a conservative approach in avalanche terrain.

Confidence

Low

Avalanche Summary

No avalanche activity has been reported.

Snowpack Summary

Over the last few days, as much as 60 cm of new snow has fallen at upper elevations, accompanied by strong to extreme alpine winds.

Various hard surfaces, including crusts or previously wind-affected snow, may exist below the recent storm snow.

Weather Summary

Thursday Night

Cloudy with 0 to 3 cm of snow. 30 to 50 km/h southeast ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

Friday

Cloudy with 10 to 30 cm of snow. 60 to 80 km/h southeast ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

Saturday

Cloudy with 10 to 50 cm of snow. 40 to 60 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

Sunday

Cloudy with 0 to 10 cm of snow. 30 to 50 km/h southeast ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • In times of uncertainty, conservative terrain choices are our best defense.
  • Start with simple terrain and gather information before committing to bigger features.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be cautious of buried obstacles, especially below treeline.

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.