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Archived

Avalanche Forecast

Feb 12th, 2022–Feb 13th, 2022
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: Yukon.

Wind slabs are likely present on lee features at all elevations and may remain reactive to human triggers on Sunday.

Whumpfing, cracking, and hollow sounds are all signs of instability that should cause you to back off into lower angle or less wind-loaded terrain.

Confidence

High -

Weather Forecast

SATURDAY NIGHT: Clearing skies / Strong, west wind / Low of -11.

SUNDAY: Sunny / Light,west wind / High of -8.

MONDAY: Sunny / Light, northwest wind / High of -10.

TUESDAY: Mix of sun and cloud / Strong, west wind / High of -6.

Avalanche Summary

No new avalanches were reported on Friday. However, our field team did report significant cracking on features that have been loaded by the wind. Whumpfing, cracking, and hollow sounds are all signs of instability that should cause you to back off into lower angle or less wind-loaded terrain.

On Thursday, explosives avalanche control between Carcross and Fraser produced a couple of size 2 windslab avalanches. These avalanches were on east and southeast aspects just above treeline.

Snowpack Summary

10-15 cm of recent snow has been hammered by strong southwest winds. Expect wind-affected surfaces on all but the most sheltered north aspects. 

Wind slabs are likely present on lee features at all elevations and may remain reactive to human triggers.

This overlies a hard crust that extends up to at least 1200 m on solar aspects. Below this, the mid-pack is generally well-settled and strong in most areas.

Weak facets (sugary snow) exist at the base of the snowpack, especially in more shallow snowpack areas such as the Inland areas.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

Avalanche Problems

Wind Slabs

Wind slabs are likely present on lee features at all elevations and may remain reactive to human triggers.

Whumpfing, cracking, and hollow sounds are all signs of instability that should cause you to back off into lower angle or less wind-loaded terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2