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Avalanche Forecast

Archived

Jan 12th, 2026–Jan 13th, 2026

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 and human triggered avalanches likely.
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.

Stick to conservative terrain and avoid terrain where the snowpack thins.

Warm temperatures may increase the reactivity of buried persistent weak layers.

Confidence

Moderate

  • Uncertainty is due to whether buried persistent weak layers become active, triggering avalanches, with the arrival of the forecast weather.

Avalanche Summary

Reports are limited; however, on Saturday, natural avalanches up to size 3 were observed. Wind slab avalanches are expected to continue as strong winds and snow persist.

On Wednesday, explosive control triggered up to size 3 avalanches in the interior of the region, releasing on multiple layers, including lower snowpack facets.

Snowpack Summary

Alpine terrain remains heavily wind affected, with light snowfall each day redistributed into deeper deposits on north and east facing slopes. South facing slopes remain scoured.

At treeline a small surface hoar layer exists 60-90 cm deep. The lower snowpack consists of 60-100 cm of weak facets, with depth hoar in shallower areas.

Alpine snowpack depths vary widely due to wind effect, ranging from 130-250 cm across the region.

Weather Summary

Monday Night
Mostly cloudy. 4 to 10 cm of snow. 40-60 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 500 m.

Tuesday
Mostly cloudy. 5 to 10 mm of precipitation as snow or rain at treeline. 40-60 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 500 m by end of day.

Wednesday

Mostly cloudy. 30 to 50 cm of snow. 40-60 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level drops to 500 m.

Thursday
Mostly cloudy. 2 to 10 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • The likelihood of deep persistent slab avalanches will increase with each day of warm weather.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.