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Avalanche Forecast

Archived

Feb 1st, 2021–Feb 2nd, 2021

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

Regions

Yukon.

A few more days of cool temperatures. You'll likely find the softest snow in sheltered terrain.

Confidence

Moderate - Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Weather Forecast

MONDAY Night: Cloudy with flurries, accumulation 2-3 cm, moderate northeast wind, temperature around -20 C.

TUESDAY: Mainly cloudy with sunny breaks, light to moderate northeast to northwest wind, temperature around -20 C.

WEDNESDAY: Cloudy with isolated flurries, moderate northwest wind, temperature around -15 C.

THURSDAY: Cloudy with flurries, moderate northwest wind, temperature around -16.

Avalanche Summary

There have been no reports of recent avalanche activity.

Snowpack Summary

The snow surface likely consists of a bit of new snow sitting on top of old wind slabs in open terrain and some soft pockets in sheltered terrain. Wind affect is reported to be widespread above 1200 m.

A buried weak layer of surface hoar may still be found around 90 cm deep. It was found around Log Cabin and also in Powder Valley (see here). Avalanche activity on this layer hasn't been reported since the first week of January and isn't expected to spike without a substantial snowfall or warming trend.

The lower snowpack is strong around White Pass but a thinner and weaker snowpack structure is expected inland, such as in the Wheaton Valley and the south Klondike.

Terrain and Travel

  • Watch for areas of hard wind slab on alpine features.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.

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.