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Avalanche Forecast

Archived

Nov 30th, 2022–Dec 1st, 2022

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

Regions

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

Continue to assess for wind slab as you move through terrain. Wind slabs could be found on all exposed terrain at treeline and above. As the cold temps settle in be sure to increase your margin for safety.

Confidence

Low

Avalanche Summary

No new avalanches were reported in the past couple days.

Thank you for all the great Mountain Information Network reports over the weekend. They are beneficial to us in the early season when we have limited information and data sources. Please keep them coming!

Snowpack Summary

A thin, early season snowpack exists. The upper snowpack has been heavily wind-effected, with hard wind slabs found on a variety of aspects. An average of 65 to 85 cm 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

Wednesday Night

Winds shifting to light to moderate from the south. Trace amounts of new snow expected with a low of -27 at 1100m.

Thursday

Flurries bringing trace amounts of new snow with temperatures at 1100m around 14. Winds in the afternoon returning to moderate to strong from the northeast.

Friday

Mostly clear with no new snow expected. Winds strong from the Northeast. temperatures around -22 at 1400m.

Saturday

Mostly clear with no new snow expected. Light to moderate winds. Temperatures around -14 at 1400m.

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.