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Avalanche Forecast

Archived

Feb 21st, 2025–Feb 22nd, 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.

Practice good travel habits, and continue to avoid large, steep, open slopes with shallow snowpacks.

The snowpack is relatively stable in this period of slow change.

Confidence

High

Avalanche Summary

No avalanches have been reported since early February.

If you are traveling in the mountains consider posting to the MIN.

Snowpack Summary

The recent snowfall is burying wind-affected surfaces in exposed terrain on all aspects and elevations. Moderate to strong south and southwest winds will likely be forming deeper deposits in leeward terrain. Ongoing cold temperatures have softened the upper snowpack in sheltered terrain.

A weak layer of facets and a crust from early December is buried 60 to 100 cm deep. This layer exists on all aspects up to 1750 m.

At the highway elevation, the snow depth is 120 cm, and in the alpine exceeds 200 cm.

Weather Summary

Friday Night

Cloudy with up to 1 cm of snow. 10 to 20 km/h south ridgetop wind. Treeline temperature - 3 °C.

Saturday

Mainly cloudy with up to 1 cm of snow. 15 to 25 km/h southeast ridgetop wind. Treeline temperature -6 °C.

Sunday

Mainly cloudy with 2-10 cm of snow. 30 to 45 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Monday

Manly cloudy with up to 5 cm of snow. 25 to 35 km/h southwest ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Avoid shallow snowpack areas, rocky outcrops, and steep terrain where triggering is most likely.
  • Be aware of the potential for large avalanches due to buried weak layers.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.