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Archived

Avalanche Forecast

Nov 21st, 2019–Nov 22nd, 2019
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
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

Regions: Glacier.

The new Winter Permit System is in effect.

Ensure you have a permit to enter restricted areas when they are open.

Be alert for persistent slabs and early season terrain traps.

Weather Forecast

Sunny skies today with light N'ly winds and freezing levels rising to 1800m. High pressure continues on Friday with freezing levels to 1000m and winds picking up to moderate from the SW. Heavy snowfall is expected to arrive on Saturday along with increased SW winds.

Snowpack Summary

A 35-50cm persistent slab sits on a crust/surface hoar/stellar layer. Below this are several melt-freeze crusts from late October. Tests are showing easy to moderate results on the persistent slab, indicating they are easily triggered by human loads.

Avalanche Summary

Human-triggered avalanches to size 2 were reported from Little Sifton, Balu Pass and the Asulkan Hut area this week. The Balu Pass avalanche buried the person to their neck and gear was lost. Numerous natural avalanches to size 2.5-3 were observed from The Dome, Tupper, MacDonald, and Cheops during the storm Sunday morning.

Confidence

Avalanche Problems

Persistent Slabs

The persistent slab sits atop a crust/surface hoar/stellar layer. This is an ideal sliding layer for this avalanche problem. Warm, direct sun with rising freezing levels may be a strong enough trigger to start an avalanche.

  • Use caution in lee areas. Recent wind loading has created wind slabs.
  • Minimize exposure to terrain traps where the consequences of an avalanche could be serious.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2