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Archived

Avalanche Forecast

Dec 1st, 2023–Dec 2nd, 2023
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Brandywine, Garibaldi, North Shore, Powell River, Sasquatch, Sky Pilot, South Coast, Stave, Tantalus, Tetrahedron.

730am update: Winter has returned! Be patient and avoid avalanche terrain while the storm snow settles. Early season hazards are still lurking below the surface.

Confidence

Low

Avalanche Summary

Expect avalanche activity to be widespread as this new storm dumps a large amount of snow over a thin, early season snowpack.

See this MIN post regarding touchy conditions on Mt. Seymour on Friday.

Snowpack Summary

Up to 50 cm of new snow has introduced rapid change to the thin, early season snowpack. In the alpine and upper treeline the new snow could form rider triggerable storm slabs on specific slopes that are above threshold.

The new snow is falling on a variety of early season surfaces, including crusts and 5-15 cm of recent snow. Previously, snow coverage in the region was generally thin, patchy and showing lots of ground roughness. Average snowpack depths at treeline ranged from 20 to 60 cm and tapered off rapidly below treeline.

Weather Summary

Friday Night

Cloudy. 30-50 cm of snow expected, with the highest amounts on the immediate coast. Strong south or southwest ridgetop wind. Treeline temperature around -3°C.

Saturday

Cloudy. 5-10 cm of snow expected. Moderate Southwest ridgetop wind. Treeline temperature around -5°C.

Sunday

Cloudy. 10-15 cm of new snow expected. Moderate southwest ridgetop wind. Freezing level rising to 1250 m.

Monday

Cloudy. Moderate to heavy rain expected. Moderate to strong south or southwest ridgetop wind. Freezing level rising to 2750m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful to keep storm day fever from luring you out into bigger terrain features.
  • Avoid areas with overhead hazard.
  • Avoid terrain traps where the consequence of any avalanche could be serious.

Avalanche Problems

Storm Slabs

A large amount of snow is falling on a thin, early season snowpack. This rapid change will increase the likelihood of avalanches, especially where existing snow has smoothed out rough ground surfaces.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1.5 - 3