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Avalanche Forecast

Archived

Nov 29th, 2024–Nov 30th, 2024

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

Hazard is low, but continue to evaluate steep lines for wind slabs before committing.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported since last weekend.

Early season observations are very limited. Please consider sharing your observations with forecasters and the backcountry community through the Mountain Information Network.

Snowpack Summary

The alpine and exposed areas at treeline generally have hard wind affected surfaces. Winds are forecast to change direction Saturday afternoon. Small pockets of triggerable wind slab may form in isolated terrain.

In lower elevation sheltered trees, surface hoar and facets are developing. These sit on top of 10-15 centimeters of soft snow overlying older firmer snow.

The snowpack is generally strong, with some crusts near the base.

Snow depths vary significantly across the region, with about 50 cm at treeline and up to 100 cm in alpine areas.

Weather Summary

Friday Night

Mostly clear. 40 km/h northeast ridgetop wind. Treeline temperature -20°C.

Saturday

Mostly sunny. 30 km/h variable ridgetop wind. Treeline temperature -25°C.

Sunday

Cloudy with 0 to 3 cm of snow expected. 25 to 40 km/h southeast ridgetop wind. Treeline temperature -25°C.

Monday

Cloudy with 5 to 10 cm of snow expected. 40 to 60 km/h south ridgetop wind. Treeline temperature -12°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.
  • Watch for areas of hard wind slab on alpine features.

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.