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Avalanche Forecast

Nov 29th, 2022–Nov 30th, 2022
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: North Shore, Sasquatch, Skagit, Sky Pilot, South Coast, Stave, Tetrahedron.

Heavy snowfall is expected to bring with it increased avalanche activity.

Confidence

Moderate

Avalanche Summary

No new avalanches have been observed in our area. In the Whistler area, however, there was one skier accidental size 2 produced from triggering a wind slab. If you head into the backcountry consider submitting a MIN report.

Snowpack Summary

At around 1000 m our snowpack is sitting at 85 cm. Since Monday morning, there has been 5 cm of new snow. At the highest elevations, recent wind-affected snow covers a melt-freeze crust and moist upper snowpack.

Snow is beginning to cover the surface roughness. The snow-dirt line is found around 1000 m, and most solar slopes and below treeline are below the threshold for avalanches. This will begin to change with the incoming storm.

Weather Summary

Tuesday Night

Cloudy, 30 to 35 cm accumulation, winds south-southwest 25 km/h gusting to 50, temperatures -5 to -10 at 1500 m.

Wednesday

Cloudy with some sunny periods, 5 to 15 cm accumulation, winds southwest 20 km/h gusting to 50, temperatures around -7 C.

Thursday

Mostly sunny, trace accumulation, winds northwest 8 km/h, temperatures -5 C at 500 m.

Friday

Mix of sun and cloud, 0 to 5 cm accumulation, winds southeast 10 km/h, temperatures -7 C with freezing levels climbing to 400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Dial back your terrain choices if you are seeing more than 30 cm of new snow.
  • Travel in alpine terrain is not recommended.

Avalanche Problems

Storm Slabs

Wednesday's storm will bring with it substantial accumulations. Rapid and intense loading will produce naturally triggered avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1 - 2