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Avalanche Forecast

Archived

Nov 30th, 2023–Dec 1st, 2023

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

Regions

Sea To Sky, Brandywine, Garibaldi, Homathko, Powell River, Spearhead, Tantalus, Sasquatch, Sasquatch, Sky Pilot, Harrison-Fraser.

Assess new snowfall amounts as you move through terrain.

New snow may form small wind slabs in isolated terrain features including: chutes, couloirs and small bowl features.

Confidence

Moderate

Avalanche Summary

No avalanches have been reported since last week.

Avalanche activity will begin ramping up with the arrival of the incoming storms.

Please consider filling out a MIN report if you are out in the backcountry.

Snowpack Summary

New snow will overlie a variety of surfaces including; a crust on steep south facing slopes in the alpine, a crust with surface hoar above it at treeline and a crust where snow exists below treeline. The above mentioned surface hoar could become a problem in the near future with subsequent storms.

Below the surface is 10 to 20 cm of faceted snow over a crust from mid November.

Above about 1600 m, snowpack height ranges from 50 to 100 cm, increasing with elevation.

Weather Summary

Thursday Night

Cloudy with up to 5 cm of new snow expected, southeast alpine wind 20 to 35 km/h, treeline temperature -6°C.

Friday

Mostly cloudy with up to 3 cm of new snow expected, southwest alpine wind 25 to 40 km/h, treeline temperature -5°C.

Saturday

Mostly cloudy , up to 15 cm of new snow by early morning with trace amounts during the day, southwest alpine wind 40 to 60 km/h, treeline temperature -3°C.

Sunday

Mostly cloudy, up to 25 cm of new snow expected, south alpine wind 60 to 80 km/h, freezing level rising to 2100 m.

 

 

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Winter conditions may exist in gullies, alpine bowls, and around ridgelines.
  • Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.
  • Travelling on skis is hazardous due to a very shallow mountain snowpack.
  • Expect shallow snow cover that barely covers ground roughness.

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.