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Avalanche Forecast

Archived

Mar 26th, 2025–Mar 27th, 2025

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

Pay attention to wind direction, wind shifting easterly may form fresh slabs on new aspects.

Confidence

Moderate

Avalanche Summary

A few size 1 to 2 wind slab avalanches were observed around White Pass on Monday, along with significant wind transport. Small dry loose avalanches were also seen around Haines Pass.

Snowpack Summary

Wind has redistributed 20 to 30 cm of recent snow, likely forming a mix of soft and hard wind slabs in open terrain while leaving some soft snow in sheltered areas.

A buried surface hoar or crust layer, 40 to 60 cm deep, is variable in distribution and has produced some test results but no recent avalanches. Similarly, a December crust with facets, 100 to 150 cm deep on all aspects up to 1750 m, has shown no recent activity or significant test results.

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

Weather Summary

Wednesday Night

Partly cloudy. 20 to 50 km/h east ridgetop wind. Treeline low temperature -10 °C.

Thursday

Mix of sun and cloud. 30 to 50 km/h northeast wind. Treeline temperature -5 °C.

Friday

Mostly sunny. 30 to 40 km/h northeast wind. Treeline temperature -5 °C.

Saturday

Sunny. 20 to 40 km/h northeast 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.