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Avalanche Forecast

Archived

Dec 20th, 2023–Dec 21st, 2023

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.
Below Treeline
Below Threshold.

Regions

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

Snow and wind through Thursday will continue to build fresh wind slabs in alpine and treeline lee terrain. This may increase the danger as the day progresses.

Confidence

Moderate

Avalanche Summary

There is no recent avalanche activity to report.

If you do go into the backcountry, consider submitting a Mountain Information Network report.

Snowpack Summary

Storm snow from last week has been redistributed into alpine and treeline lee terrain by predominantly southerly wind. Below the 1200 meter elevation band, a thick crust is present approximately 50 cm above the ground. The middle and lower snowpack is reported to be well settled and bonded. Snow depth varies from 75-200 cm depending on the aspect.

Weather Summary

Wednesday Night

Mostly cloudy with 3-5 cm of snow, ridgetop wind southwest 30-40 km/h treeline temperature -12 °C. 

Thursday

Cloudy with 3 to 8 cm of snow, ridgetop wind southwest 30 to 50 km/h, treeline temperature -8 °C. 

Friday

Mostly cloudy with a trace of snow, ridgetop wind southwest 20 to 30 km/h, treeline temperature -7 °C. 

Saturday

Cloudy with snow, ridgetop wind southwest 30-60 km/h, treeline temperature -5 °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.
  • Sheltered slopes at lower elevations will offer the best 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.