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Avalanche Forecast

Archived

Jan 8th, 2020–Jan 9th, 2020

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

Yukon.

A stable weather pattern is forecast through to the end of the week. Expect sunny skies and cold temperatures with light wind. The wind is expected to increase on Friday.

Confidence

High - Confidence is due to a stable weather pattern; little change is expected for several days.

Weather Forecast

Wednesday Night: Cloudy with clear periods. Temperature around -20°C. Light northeast wind.

Thursday: Mix of sun and cloud. Temperature around -27°C. Light northwest wind.

Friday: Mainly sunny. Temperature around -30°C. Light to moderate northeast wind.

Saturday: Mainly sunny. Temperature around -30°C. Moderate northeast wind.

Avalanche Summary

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

Snowpack Summary

Around 25 cm of soft snow overlies a relatively well-consolidated mid and lower snowpack with no obvious weak layers. In some locations you may find a 2 cm thick crust below the recent fresh snow. In exposed locations, the fresh snow has been blown into variable-thickness wind slabs, which may pose local hazards, but are not expected to propagate widely in most locations. 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 any observations to confirm this.

Terrain and Travel

  • Watch for areas of hard wind slab on alpine features.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.