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Avalanche Forecast

Archived

Mar 9th, 2025–Mar 10th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
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, Haines Pass.

Back off if you encounter signs of instability like whumpfing, shooting cracks or stiff wind-effected snow. Human-triggered avalanches remain possible.

Confidence

Moderate

Avalanche Summary

On Saturday, a size 2 Storm slab avalanche on a northeast aspect at 1700m was reported in the Big Kahuna area of White Pass.

There has been little avalanche activity reported in the previous few days. If you do observe an avalanche, consider posting a MIN.

Snowpack Summary

10 to 15 cm of new snow has accumulated on various surfaces, including a melt-freeze crust on solar slopes, hard wind-affected surfaces, or faceted snow and surface hoar on shady slopes.

At treeline, there are at least two temperature crusts within the recent storm snow down approximately 45 cm.

A weak layer of facets and a crust from early December is buried 60 to 150 cm deep on all aspects up to 1750 m. This layer has not produced recent avalanche activity or test results and is not currently a concern.

Snow depth varies from 100 cm at highway elevations to over 200 cm in the alpine.

Weather Summary

Sunday Night

Mostly cloudy with 0 to 1 cm of snow. 20 to 30 km/h southeast ridgetop wind. Treeline temperature -9 °C.

Monday

Mostly cloudy with 0 to 2 cm of snow. 20 to 30 km/h east ridgetop wind. Treeline temperature -8 °C.

Tuesday

Mainly cloudy with isolated flurries. 10 to 20 km/h south ridgetop wind. Treeline temperature -7 °C.

Wednesday

Cloudy with isolated flurries. 30 km/h southeast ridgetop wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid freshly wind-loaded terrain 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.