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Avalanche Forecast

Archived

Apr 10th, 2026–Apr 11th, 2026

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

South Coast Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

Crust recovery is a bit uncertain for Saturday, but it's mainly a travel conditions concern. Lingering cornices are the main hazard to avoid--they're an effective avalanche trigger.

Confidence

High

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.

Avalanche Summary

Activity in the region has been on a downward trend, with cornices accounting for most of the interesting recent observations.

A cornice fall above Armchair Glacier was seen Wednesday, suspected to have failed 12 - 24 hours earlier. It triggered a slab on the slope below (adding up to size 3), likely on one of the persistent layers mentioned in our snowpack summary. A second size 2 cornice fall on a NE aspect at about 2500 m was observed by another group in the Duffey corridor.

Snowpack Summary

Sustained high freezing levels with a bit of insulating cloud cover may work against crust recovery on Saturday, possibly keeping or moving the snowpack below 2000 m closer to an isothermal state. Up to about 10 cm of windblown dry snow may still be hiding on north-facing slopes above 2000 m. It overlies old wind-affected snow above this elevation and a firm crust below.

Two older crusts exist 1-1.5 m deep at treeline and above. Concern for these layers is limited to high north aspects where large cornice fall may have enough force to trigger a slab, like what was observed on Armchair Glacier Wednesday. The snowpack below these layers is well settled.

Weather Summary

Friday Night
Mostly clear skies. 20 km/h southwest ridgetop wind, easing. Treeline temperature 4 °C. Freezing level 2600 m.

Saturday
A mix of sun and cloud with isolated showers, less than 1 mm. 10 km/h southwest ridgetop wind. Treeline temperature around 4 °C. Freezing level falling from 2600 m to 2400 m.

Sunday
Mostly cloudy with scattered showers, 1 to 3 mm, after 5 mm overnight. 10 to 15 km/h variable ridgetop wind. Treeline high temperature 4 °C. Freezing level to 2400 m.

Monday
Mostly cloudy with scattered showers, 1 mm, with a possible trace of alpine snow. 20 to 40 km/h southwest ridgetop wind, increasing. Treeline high temperature 1 °C. Freezing level to 2100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

Problems

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.