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Avalanche Forecast

Archived

Dec 8th, 2024–Dec 9th, 2024

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

Regions

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

Watch for lingering pockets of wind slab in the alpine.

Confidence

Moderate

Avalanche Summary

A natural avalanche cycle occurred last week as rain impacted the region. See this MIN for more details.

Looking forward, the main concern will be the potential for lingering wind slabs on lee features in the alpine. Check out this MIN for more details.

Please consider sharing your observations through the Mountain Information Network.

Snowpack Summary

Above 1500 m, 10 to 30 cm of recent storm snow has been redistributed by strong southwest winds. Below this, a crust exists on or near the surface with moist snow below.

The remainder of the snowpack is dry, with small faceted crystals to ground. 

Snow depths vary significantly, averaging around 70 to 130 cm at White Pass.

Weather Summary

Sunday Night

Mostly cloudy. 15 to 30 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Monday

Cloudy with upto 2 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Tuesday

Cloudy with up to 5 cm of snow. 30 to 60 km/h south ridgetop wind. Treeline temperature -3 °C.

Wednesday

Cloudy with up to 5 cm of snow. 30 to 60 km/h south ridgetop wind. Treeline temperature -3°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for areas of hard wind slab on alpine features.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.

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.