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Archived

Avalanche Forecast

Dec 27th, 2024–Dec 28th, 2024
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
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Harrison-Fraser, North Shore, Powell River, Sasquatch, Sky Pilot, South Coast, Stave, Tetrahedron.

6:40 AM Update: Expect increased avalanche danger during the stormy period.

Confidence

Moderate

Avalanche Summary

Skiers near Cypress reported one small avalanche in this MIN post on Thursday.

During the storm, large, natural and human triggered avalanches can be expected.

Observations have been limited in this region. If you go into the backcountry, please consider submitting a Mountain Information Network (MIN) post.

Snowpack Summary

20 to 50 cm is expected by end of day Saturday at upper elevations. This snow will be transported by strong south winds, building reactive cornices and slabs on lee slopes.

Above 1000 m, this snow falls on about 60 cm of previous storm snow, which is reportedly well bonded to the well-settled snowpack below. Below 1000 m, there has been mixed rain and snow, making for moist snow surface conditions

Check out this MIN for conditions at Hollyburn Mountain.

Weather Summary

Friday Night

Cloudy with 10 to 25 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1000 m.

SaturdayCloudy with 10 to 25 cm of snow. 50 to 70 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1100 m.

Sunday

Partly cloudy with trace precipitation. 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1000 m.

MondayMostly cloudy with up to 5 mm of precipitation. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level rising to 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.

Avalanche Problems

Storm Slabs

Storm slabs will be deeper and easier to trigger on lee slopes where the wind has created fresh deposits.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2