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Avalanche Forecast

Archived

Dec 31st, 2022–Jan 1st, 2023

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.
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.

UPDATED SUNDAY AT 7:25 AM: Forecast snowfall amounts for today have backed off. Watch for wind slabs forming in alpine terrain.

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

New snow and wind will likely build reactive wind slabs throughout the day. These slabs will be largest and most reactive on north aspects.

In the mid pack, down around 50 to 70cm, 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

Saturday Night

Stormy with 5 to 10cm of new snow expected at White Pass. Moderate to strong south winds and a Low of -3 at 1500m.

Sunday

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

Monday

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

Tuesday

Cloudy with flurries bringing a few centimeters of new snow. Light South wind and a high of -4 at 1500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Wind slabs are most reactive during their formation.
  • Use ridges or ribs to avoid areas of wind loaded snow.

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.