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Avalanche Forecast

Archived

Mar 23rd, 2025–Mar 24th, 2025

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, Haines Pass.

Be cautious as you transition into wind effected terrain.

If you notice signs of instability like shooting cracks. head to non-wind effected terrain.

Confidence

High

Avalanche Summary

On Saturday, there were reports of wind slab avalanches up to size 1.5 on north-facing aspects at treeline in White Pass.

No other avalanche activity has been reported in recent days. If you do see an avalanche, please consider posting a MIN report.

Snowpack Summary

15-25 cm of recent snow, with greater amounts in western White Pass, is being redistributed by primarily southerly winds.

Reports indicate that eastern areas of White Pass have a shallower, weaker snowpack. A buried layer of surface hoar or a hard crust, 30 to 50 cm deep, has produced recent cracking, whumpfs, and remains reactive in tests.

A December crust with facets sits 100 to 150 cm deep on all aspects up to 1750 m. This layer has not shown recent activity or significant test results.

Snow depth ranges from 100 cm at highway elevations to over 300 cm in the alpine.

Weather Summary

Sunday Night

Cloudy with 1 to 3 cm of snow. 10 km/h east ridgetop wind. Treeline temperature -7 °C.

Monday

Cloudy with 0 to 3 cm of snow. 20 to 50 km/h south ridgetop wind. Treeline temperature -5 °C.

Tuesday

Mostly cloudy. 0 to 3 cm of snow 10 to 30 km/h southeast wind. Treeline temperature -4 °C.

Wednesday

Mostly cloudy. 10 to 30 km/h southeast wind. Treeline temperature -3 °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.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.

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.