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Avalanche Forecast

Archived

Mar 7th, 2025–Mar 8th, 2025

Alpine
Natural avalanches possible, human triggered probable.
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.
Below Treeline
Below Threshold.

Regions

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

Start small and investigate new snow amounts and reactivity as you gain elevation on Saturday. Sheltered slopes should offer the best quality, safest skiing and riding.

Confidence

Moderate

Avalanche Summary

It has been a quiet week for avalanche activity after size 1.5 and size 2 wind slab avalanches observed in White Pass and Haines Summit at the beginning of the week.

Looking forward, wind slabs should increase in size and reactivity as new snow accumulates through Saturday morning. Expect them to be sensitive to rider triggering on Saturday.

Snowpack Summary

By Saturday morning, 10 to 15 cm of new snow should accumulate on a variety of surfaces, including a melt-freeze crust on solar slopes and hard wind-affected surfaces or faceted snow and surface hoar on shady slopes. Strong southwesterly winds will certainly form deeper deposits on leeward slopes.

A weak layer of facets and a crust from early December is buried 60 to 150 cm deep on all aspects up to 1750 m. This layer has not produced recent avalanche activity or test results and is not currently a concern.

Snow depth varies from 100 cm at highway elevations to over 200 cm in the alpine.

Weather Summary

Friday Night

Cloudy with easing flurries bringing about 5 cm of new snow. 40 to 60 km/h southwest ridgetop wind.

Saturday

Partly cloudy with new snow totals of 10 - 15 cm. 20 km/h south ridgetop wind. Treeline temperature -6 °C.

Sunday

Mainly cloudy with isolated flurries. 10 to 20 km/h south ridgetop wind. Treeline temperature -7 °C.

Monday

Cloudy with isolated flurries. 30 km/h southeast ridgetop wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Dial back your terrain choices if you are seeing more than 20 cm of new snow.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

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.