Avalanche Forecast

Issued: Dec 15th, 2024 4:00PM

The alpine rating is low, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada Avalanche Canada, Avalanche Canada

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Conditions are generally safe but small wind slabs can have serious consequences in steep terrain.

Continue to assess your route carefully and follow safe travel practices.

Summary

Confidence

Moderate

Avalanche Summary

On Friday and Thursday, north of Stewart, several explosive and skier-triggered wind slab avalanches occurred up to size 1.5.

Wind slabs like these are becoming less likely to trigger, but may remain sensitive to human triggers in isolated areas, particularly where they overlay surface hoar.

Snowpack Summary

On the surface, around 15 to 30 cm of snow has combined over the last two storms. This snow sits on a thick rain crust which may also have weak surface hoar or facets overlying it in some areas around Terrace and Stewart.

Recent winds have varied in direction, so wind slabs may be present on all aspects. These slabs should bond quickly, but may be more reactive where they overlie the weak surface hoar and facets.

The mid and lower snowpack are not concerning at this time, and are made up of various hard layers, or moist snow at lower elevations.

Weather Summary

Sunday Night

Mostly Clear. 10 to 25 km/h northwest ridgetop wind. Treeline temperature -10 °C.

Monday

Mostly Sunny. 35 km/h southeast ridgetop wind. Treeline temperature -10 °C.

Tuesday

A mix of sun and cloud. 30 km/h southeast ridgetop wind. Treeline temperature -9 °C.

Wednesday

Cloudy with 1 to 5 cm of snow. 35 to 50 km/h southwest ridgetop wind. Treeline temperature -6 °C

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Wind slabs are isolated, but may remain reactive.

Problems

Wind Slabs

An icon showing Wind Slabs

Recent wind has varied in direction, so watch for isolated wind slabs on all aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

JavaScript chart by amCharts 3.20.8

Likelihood

Possible

Expected Size

1 - 1.5

Valid until: Dec 16th, 2024 4:00PM

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