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Archived

Avalanche Forecast

Dec 20th, 2024–Dec 21st, 2024
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
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
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: Birkenhead, Duffey, South Chilcotin, South Coast Inland, Stein, Taseko.

Keep an eye out for signs of instability and continually assess conditions as you move through terrain.

Storm slabs have the potential for wide propagation due to buried weak layers.

Confidence

Moderate

Avalanche Summary

On Thursday, a skier triggered size 2 persistent slab avalanche was reported. This avalanche was on an east aspect at 2100 m. It released on the layer of surface hoar mentioned in the snowpack summary.

Snowpack Summary

Up to 10 cm of new snow may have fallen by 4 pm on the 21st. This new snow will be accompanied by strong southerly winds which will form deeper deposits on northerly aspects.

A crust or moist snow will be observed on the surface at lower elevations.

30 to 60 cm overlies a crust on south aspects and all aspects below 1800 m from early December. A layer of surface hoar could be found just above this layer in sheltered terrain at treeline.

Snow depths at treeline are around 90 to 140 cm.

Weather Summary

Friday NightMix of cloud and clear skies with 1 to 3 cm of snow. 25 to 50 km/h southeast ridgetop wind. Treeline temperature -2 °C.SaturdayCloudy with up to 10 cm of snow. 30 to 50 km/h southerly ridgetop wind. Freezing level around 1800 m.

Sunday

Mix of sun and cloud with trace amounts of snow. 30 to 60 km/h southeast ridgetop wind. Freezing level around 1700 m.

Monday

Mostly cloudy with around 5 cm of snow. 20 to 40 km/h south ridgetop wind. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be careful as you transition into wind-affected terrain.
  • Be alert to conditions that change with aspect and elevation.
  • Be aware of the potential for large avalanches due to buried surface hoar.

Avalanche Problems

Storm Slabs

Rider triggerable storm slabs may still be found at higher elevations.

Be aware of the potential for wide propagation due to buried weak layers.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5