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Avalanche Forecast

Archived

Nov 30th, 2023–Dec 1st, 2023

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 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 possible, human triggered probable.

Regions

South Coast, North Shore, Tetrahedron.

Assess new snowfall amounts as you move through terrain. Rider triggerable wind slab could have formed in gullies and similar features.

Confidence

Low

Avalanche Summary

No avalanches have been reported in the region yet this season. Please consider filling out a MIN report if you are out in the backcountry.

Snowpack Summary

Up to 20 cm of new snow will have fallen over a crust where snow already covered the ground. At higher elevations, where some terrain features are above threshold for avalanches, this new snow may have formed rider triggerable wind slab.

Snow coverage in the region is generally thin, patchy and showing lots of ground roughness. Average snowpack depths at treeline range from 20 to 60 cm and taper off rapidly below treeline.

 

Weather Summary

Thursday Night

Cloudy with up to 10 cm of new snow expected, southeast ridgetop wind 20 to 35 km/h, treeline temperature -3°C.

Friday

Mostly cloudy with up to 10 cm of new snow expected, southeast ridgetop wind 10 to 25 km/h shifting to west in the afternoon, treeline temperature -2°C.

Saturday

A mix of sun and cloud, up to 30 cm of new snow by early morning with another 10 cm during the day, southwest ridgetop wind 30 to 60 km/h, freezing level rising to 1300 m.

Sunday

Mostly cloudy, up to 45 mm of rain expected, south ridgetop wind 40 to 60 km/h, freezing level rising to 2500 m.

More details can be found in the Mountain Weather Forecast.

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.
  • Travelling on skis is hazardous due to a very shallow mountain snowpack.
  • Expect shallow snow cover that barely covers ground roughness.
  • Avalanche danger is often elevated in alpine gullies where snow has accumulated.

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.