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Avalanche Forecast

Archived

Dec 21st, 2024–Dec 22nd, 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, human triggered possible.
Below Treeline
Below Threshold.

Regions

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

Reactive wind slab may exist on leeward slopes. Cracking and whumpfing are signs of unstable snow.

Softer snow may be found at lower elevations in wind sheltered terrain.

Confidence

Low

Avalanche Summary

No new avalanches have been reported from the region.

Strong winds and new snow may form fresh wind slabs at upper elevations.

Observations have been limited. Please consider sharing your observations through the Mountain Information Network.

Snowpack Summary

Stiff wind-affected snow covers most open and exposed areas. Pockets of soft snow may hide in sheltered lee features at upper elevations.

10 to 20 cm of snow sits above a firm, supportive crust.

The remainder of the snowpack has no layers of concern. Snowpack depths range from about 70 to 180 cm.

Weather Summary

Saturday night

Cloudy, with scattered flurries. 40 to 80 km/h south ridgetop wind. Treeline temperature -10 °C.

Sunday

Cloudy with snow 2 to 7 cm. 40 to 55 km/h south ridgetop wind. Treeline temperature -6 °C.

Monday

New snow 5 to 10 cm. 45 gusting to 100 km/h south ridgetop wind. Treeline temperature -6 °C.

Tuesday

Snow 5 to 15 cm. 30 to 85 km/h south ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Periods of low danger may be a good time to increase your exposure.

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.