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Avalanche Forecast

Archived

Mar 15th, 2025–Mar 16th, 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.

Wind slabs are the main concern. Be cautious when transitioning into wind-affected areas. Back off if you encounter whumpfing, shooting cracks, or hollow sounds.

Confidence

Moderate

Avalanche Summary

On Friday, a size 1 skier triggered wind slab avalanche was reported just outside the region near Mount Carmack. See MIN for details.

A skier remote, size 1.5 slab avalanche was also observed in Haines Pass. This avalanche is believed to have occurred 24 to 48 hours prior to the time of observation. See MIN for details.

If you head into the backcountry, please consider posting a MIN report with photos and observations from your day.

Snowpack Summary

20 to 50 cm of storm snow has been redistributed by southerly winds. This snow overlies a melt-freeze crust on solar slopes, hard, wind-affected snow in exposed areas, previous storm snow in sheltered spots, and facets or surface hoar on shady slopes.

Reports from the eastern portion of the White Pass area indicate a surface hoar layer 30 to 50 cm below the surface is reactive in snowpack tests and remains a concern.

A weak layer of facets sitting on a crust that formed in early December is buried 70 to 200 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 300 cm in the alpine.

Weather Summary

Saturday Night

Mostly clear skies. 10 to 25 km/h north ridgetop wind. Treeline temperature -17 °C.

Sunday

Mix of sun and cloud. 10 to 25 km/h northwest wind. Treeline temperature -16 °C.

Monday

Mix of sun and cloud. 30 to 50 km/h southwest wind. Treeline temperature -10 °C.

Tuesday

Cloudy with light flurries, 1 to 5 cm of snow. 30 to 40 km/h south wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Expect slab conditions to change drastically as you move into wind-exposed terrain.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • 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.