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Avalanche Forecast

Archived

Dec 30th, 2022–Dec 31st, 2022

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

Regions

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

Keep an eye on the wind and watch for blowing snow. South winds will likely form rider triggerable wind slab throughout the day.

Confidence

High

Avalanche Summary

No new avalanches have been reported recently but we expect that rider triggerable wind slabs will form throughout the day.

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

Snowpack Summary

15 to 25cm of low density recent snow will likely form wind slab on north aspects and cross load others as the south winds pick up throughout the day. Underneath this low density snow a variety of surfaces can be found like old hard slab, facets and even bare ground.

In the mid pack, down around 50cm, it could be possible to find a thin layer of facets between old wind slabs. This layer recently produced sudden results in snowpack tests.

The height of the snowpack is variable. In areas lee of the prevailing wind, depths of up to 170cm can be found. At the lower elevation treeline terrain, snow depths decrease and are estimated at 60-90 cm.

Weather Summary

Friday Night

cloudy with flurries bringing trace amounts of new snow. Moderate southwest winds at ridge top and a low of -8 at 1500m.

Saturday

A mix of sun and cloud with the possibility of light flurries bringing trace amounts of new snow. Moderate to strong south winds and a high of -4 at 1500m.

Sunday

Stormy with 5 to 20cm of new snow expected. Strong south winds. High of -1 at 1500m.

Monday

Stormy with 5 to 10cm of new snow expected Moderate to strong south winds. High of -2 at 1500m..

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Pay attention to the wind, once it starts to blow fresh sensitive wind slabs are likely to form.
  • Wind slabs are most reactive during their formation.
  • Closely monitor how the new snow is bonding to the old surface.

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.