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Avalanche Forecast

Archived

Nov 24th, 2024–Nov 25th, 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.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

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

Remain vigilant in steep terrain; small avalanches may still be triggerable on wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

No recent avalanches have been observed.

Early season reports have been extremely limited. Please consider helping forecasters and your backcountry community by submitting your observations to the Mountain Information Network.

Snowpack Summary

Previous and forecast strong winds from variable directions have moved and changed the surface snow at all elevations.

Expect to find widespread sastrugi snow in open exposed areas, and hard wind slabs on leeward slopes.

The lower snowpack is generally strong, with the potential for various crusts at the base.

Snow depths are highly variable across the region with approximately 50 cm around treeline, and up to 100 cm in wind-loaded locations in the alpine.

Weather Summary

Sunday Night

Mostly clear. 25 to 45 km/h southwest ridgetop wind. Treeline temperature -17 °C with a temperature inversion of -5 °C above 1500 m..

Monday

Cloudy with 0 to 3 cm of snow. 55 to 65 km/h southwest ridgetop wind. Treeline temperature -12 °C

Tuesday

Cloudy with 1 to 3 cm of snow. 15 to 20 km/h southwest ridgetop wind. Treeline temperature -12 °C.

Wednesday

Cloudy with 0 to 2 cm of snow. 30 km/h northeast ridgetop wind. Treeline temperature -15 °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.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • 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.