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Avalanche Forecast

Archived

Dec 15th, 2023–Dec 16th, 2023

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

Regions

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

Conservative decision making is essential after 60 to 115 cm of new snow.

Confidence

Moderate

Avalanche Summary

A few size 2 natural wind slab avalanches on north-facing, alpine terrain were reported on Wednesday. These avalanches are suspected to be up to 100 cm deep.

Otherwise, reports have been very limited during the stormy period.

Check out Wednesday's report from our Avalanche Canada field team.

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

Snowpack Summary

Storm snow totals are now 70 to 115 cm in the White Pass. This new snow continues to be redistributed by moderate to strong southwesterly winds. Deep deposits of wind-loaded snow can be found on north and northeast facing slopes, and on lee features. South-facing slopes may be stripped of snow by recent winds.

There may be stiff wind slab underneath new fluffy snow, be sure to dig and investigate. Limited field observations mean we do not know if the new snow is bonding well to the old snow surface.

Treeline snow depth is roughly 100 cm, however, snow depths overall remain highly variable.

Weather Summary

Friday Night

Mostly cloudy with a trace of new snow possible, southwest ridge top winds 40 to 60 km/h, treeline temperature -9°C. 

Saturday

Partly cloudy with a chance of 2 cm of snow in the south of the region, southwest ridge top winds 40 to 60 km/h, treeline temperature -6°C. 

Sunday

Cloudy with 5 to 15 cm of snow, southwest ridgetop winds 60 to 90 km/h, treeline temperature -3°C.

Monday

Partly cloudy with no precipitation, northwesterly ridge top winds 40 km/h decrease to light northeasterly throughout the morning, treeline temperature 12°C. 

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind loaded terrain features.
  • The new snow may require another day to settle and stabilize.

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.