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Avalanche Forecast

Archived

Dec 26th, 2022–Dec 27th, 2022

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

Regions

Yukon, Tutshi, Wheaton, White Pass East, White Pass West.

Observations have been very limited recently but wind slabs are expected to be reactive and extra caution is recommended in wind-exposed terrain.

If you're out in the mountains, please consider submitting a MIN and let us know what you're seeing.

Confidence

Low

Avalanche Summary

No new avalanches have been reported recently but observations have been very limited.

Wind slabs are expected to be reactive to human-triggering on Tuesday resulting from the recent snowfall and ongoing wind.

Continue to support your backcountry community and please consider submitting a MIN report.

Snowpack Summary

Recent snowfall with variable winds over the past few days is expected to have formed new wind slabs. While data has been very sparse recently, a variety of surfaces are expected in the alpine including new wind slabs, old hard slabs, wind scouring, a crust, and even exposed ground.

The height of the snowpack is variable. In areas lee of the prevailing wind, depths of up to 150 cm can be found. At the lower elevation treeline terrain, snow depths decrease and are estimated at 60-90 cm.

Weather Summary

Monday night

Light snowfall up to 5 cm, moderate S-SW wind, treeline low around -12 °C.

Tuesday

Mainly cloudy with lingering flurries in the morning and a chance of sunny breaks in the afternoon, moderate S-SW wind, treeline high around -10 °C.

Wednesday

Mainly cloudy with a chance of sunny breaks, light SW wind, treeline high around -10 °C.

Thursday

A mix of sun and cloud, light SE wind, treeline high around -12 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Use ridges or ribs to avoid areas of wind loaded snow.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

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.