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Archived

Avalanche Forecast

Nov 13th, 2023–Nov 17th, 2023
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Glacier.

Helmets and old skis/boards are mandatory if you're visiting the Pass. With just over a metre of snow in the higher Alpine, expect to find many hard objects hidden in the snow, waiting to put in a dent in you and your plans.

Confidence

Low

Avalanche Summary

Several natural and human-triggered avalanches have been observed in the Alpine and upper Treeline elevations. Notably on Nov 12, a sz 2.5 slab avalanche, ~1m deep, was triggered from 200m away while a group approached the final headwall to Video Peak. Extensive "whumphing" has also been reported, common when basal facets get overloaded and then collapse.

Snowpack Summary

Basal sugary facets have been found at Treeline/Alpine elevations. These facets offer little support in a young snowpack, often collapsing and producing loud "whumphing" sounds. Snow depth increases with elevation, but expect many rocks/trees lurking at and just below the snow surface.

Weather Summary

Detailed weather forecasts can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.
  • Storm snow and wind is forming touchy slabs. Use caution in lee areas in the alpine and treeline.

Avalanche Problems

Persistent Slabs

Basal facets are more likely to be triggered in shallow, rocky areas, such as ridge-crests and open, convex slopes. A bridging crust exists below Treeline, preventing folks from sinking to the ground at lower elevations.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2.5

Storm Slabs

New snow and moderate/strong SW winds have created storm slabs in lee Treeline and Alpine features.

Aspects: North, North East, East, South East, South, North West.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2