Avalanche Canada mconlan, Avalanche Canada

Yukon Avalanche Forecast

Jan 13th, 2020 2:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is below threshold. Known problems include Wind Slabs.

Outflow winds continue this week. There is uncertainty on the distribution and sensitivity of wind slabs. If you venture out in the frigid conditions, best to look for soft snow in sheltered terrain.

Summary

Confidence

Moderate - Uncertainty is due to the limited number of field observations.

Weather Forecast

MONDAY NIGHT: Clear skies, light to moderate northeast wind, alpine temperature -25 C.

TUESDAY: Clear skies, light to moderate northeast wind, alpine temperature -25 C.

WEDNESDAY: Clear skies, moderate northeast wind, alpine temperature -22 C.

THURSDAY: Clear skies, strong northeast wind, alpine temperature -22 C.

Avalanche Summary

There have been no reports of avalanche activity in the past few days.

Snowpack Summary

Strong northeast wind has prevailed since late last week, stripping away snow in exposed terrain and depositing it in lee terrain features. Isolated wind slabs may still be found.

Snow depths at White Pass average around 150 cm; deeper locations (higher terrain west of the highway) have as much as 200 cm. It's reasonable to expect a thin snowpack with sugary facets in the Wheaton Valley, although we don't yet have observations to confirm this.

Terrain and Travel

  • Watch for areas of hard wind slab on alpine features.
  • Be aware of highly variable recent wind loading patterns.

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Possible

Expected Size

1 - 2

Strong outflow winds have stripped away snow in exposed terrain. Pockets of wind slabs may still exist in lee terrain features and they could be reactive to human traffic.

Aspects:

South East, South, South West, West, North West.

Elevations:

Alpine, Treeline.

Valid until: Jan 15th, 2020 5:00PM