Avalanche Forecast

Archived

Dec 1st, 2022–Dec 2nd, 2022

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Below Threshold.

Alpine

Natural avalanches unlikely.

Treeline

Natural avalanches unlikely.

Below Treeline

Below Threshold.

Alpine

Natural avalanches unlikely.

Treeline

Natural avalanches unlikely.

Below Treeline

Below Threshold.

Regions

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

Continue to assess for wind slab as you move through terrain. Wind slabs are becoming stubborn to rider triggering but may be found in steep terrain and cross loaded features. Use extra caution during the cold weather and increase your safety margin.

Confidence

Low

Avalanche Summary

No new avalanches were reported in the past few days.

Thank you for all the great Mountain Information Network reports . They are much appreciated by our forecasters. Please keep them coming!

Snowpack Summary

The upper snowpack has been heavily wind effected, with hard wind slabs found on all aspects. Sustained cold temperatures has likely softening the snow surface in non wind effected terrain. An average of 65 to 90cm can be found at treeline in White Pass. Upwards of 100 cm may exist in wind-loaded areas.

The lower snowpack consists of soft, sugary facets and a crust near ground level.

Weather Summary

Thursday Night

A trace of new snow expected with moderate to strong northeast winds. Temperatures at 1500m around -20.

Friday

A mix of sun and cloud with no new snow expected. Winds strong from the Northeast in the morning and shifting to light south in the late afternoon. temperatures around -22 at valley bottom. Possibility of a temperature inversion with temperatures at treeline around -15.

Saturday

Mostly clear with no new snow expected. Light to moderate winds from the northwest. Temperatures around -14 at valley bottom. Temperature inversion likely.

Sunday

Mostly cloudy with light flurries bringing trace amounts of new snow. Light northerly winds. Temperature inversion breaks down, temperatures around -9 at 1500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Recent wind has varied in direction so watch for wind slabs on all aspects.
Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

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.