Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Dec 7th, 2024–Dec 8th, 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.

Wind slabs in the alpine will be the main concern.

A thick surface crust will present very challenging travel conditions.

Confidence

Low

Avalanche Summary

A natural avalanche cycle occurred last week as rain and warm temperatures infiltrated the region. See this MIN for more details.

Looking forward, the main concern will be the potential for deep deposits of wind slab on lee features in the alpine.

Please consider sharing your observations through the Mountain Information Network.

Snowpack Summary

Above 1500 m, new snow has been redistributed by strong southwest winds. Deposits of wind slab as well as heavily wind-affected surfaces exist. At lower elevations, a thick crust exists on 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

Saturday Night

Mainly cloudy. 5 to 20 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Sunday

A mix of sun and cloud. 25 to 40 km/h northwest ridgetop wind. Treeline temperature -10 °C.

Monday

Cloudy with up to 2 cm of new snow. 50 to 80 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Tuesday

Cloudy with up to 5 cm of new snow. 50 to 80 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.