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Avalanche Forecast

Archived

Feb 25th, 2025–Feb 26th, 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, human triggered possible.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Below Threshold.

Regions

Yukon, Tutshi, Wheaton, White Pass East, White Pass West.

New snow and strong wind may form fresh and reactive wind slabs.

Be especially cautious on northerly facing slopes where the wind may have made deeper deposits of snow.

Confidence

Moderate

Avalanche Summary

No recent avalanche observations reported.

No persistent slab avalanches have been reported since early February.

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

Snowpack Summary

Up to 10 cm of new snow accompanied by strong southwest wind may build new wind slabs Wednesday. It sits over firm wind-affected surfaces in exposed areas or softer, faceted snow in sheltered terrain. A crust may exist on steep solar aspects.

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. This layer has not been active in producing avalanches or test results in several weeks and is generally not a concern at this time.

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

Weather Summary

Tuesday Night

Partly cloudy with a trace of snow. 25 to 45 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Wednesday

Mainly cloudy with 5 to 10 cm of snow. 20 to 50 km/h southeast ridgetop wind. Treeline temperature -3 °C.

Thursday

Cloudy with some sunny periods and 3 to 5 cm of snow. 45 to 75 km/h south ridgetop wind. Treeline temperature -2 °C.

Friday

Mix of sun and cloud with a trace of new snow. 10 km south ridgetop wind. Treeline temperature -2 °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.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

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.