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Avalanche Forecast

Archived

Apr 11th, 2025–Apr 12th, 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.

Exercise caution when moving into wind-loaded terrain.

Recent snowfall and strong winds have formed small wind slabs in lee features at higher elevations.

Confidence

Moderate

Avalanche Summary

On Thursday in white pass, small (size 1) wind slab and loose dry avalanches where reported near ridge top.

If you observe an avalanche, please share your observations on the Mountain Information Network.

Snowpack Summary

Up to 15 cm of new snow is now resting on wind pressed surfaces and wind slabs in open terrain while leaving 15-25 cm of settled surface snow in sheltered areas. A melt-freeze crust covers most solar slopes as well as northerly slopes up to 1250 m.

Below 1100 m the snowpack is wet and unconsolidated.

  • A buried surface hoar or crust layer, 40 to 60 cm deep, is variable in distribution.

  • A December crust with facets, 100 to 150 cm deep on all aspects up to 1750 m, has shown no significant test results.

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

Weather Summary

Friday Night

Mostly cloudy with flurries. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -8 °C. Freezing level 0 m.

Saturday

Mostly cloudy with flurries. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level 500 m.

Sunday

Cloudy with up to 10 cm snow. 50 to 70 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 900 m.

Monday

Mostly cloudy with flurries. 40 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.