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Avalanche Forecast

Archived

Feb 10th, 2025–Feb 11th, 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.

Avoid shallow, rocky, wind-affected areas where human-triggering a slab is more likely.

Soft snow and good riding can be found in sheltered terrain features.

Confidence

Moderate

Avalanche Summary

There have been no new persistent slab avalanches reported in the past week, but uncertainty remains regarding the early December layer mentioned in the snowpack summary.

If you're heading into the backcountry please consider making a MIN report with your observations and photos from the day. All information is helpful for forecasters!

Snowpack Summary

Previous strong outflow wind has impacted the snow surface in exposed terrain on all aspects and elevations. Ongoing cold temperatures have softened the upper snowpack in sheltered terrain.

A weak layer of facets and a crust from early December is buried 70 to 100 cm deep. This layer exists on all aspects up to 1700 m.

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

Weather Summary

Monday Night

Clear. 10 to 20 km/h northeast ridgetop wind. Treeline temperature -15 °C, potential for strong temperature inversion with a high of -7 °C in the alpine.

Tuesday

Sunny. 10 to 15 km/h southwest ridgetop wind. Treeline temperature -10 °C, potential for strong temperature inversion with a high of -5 °C in the alpine.

Wednesday

Sunny. 10 to 25 km/h northwest ridgetop wind. Treeline temperature -12 °C, potential for inversion with warmer temperatures in the alpine.

Thursday

Mainly cloudy with isolated flurries, 1 cm of snow. 15 to 20 km/h southwest ridgetop wind. Treeline temperature -15 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Be aware of the potential for large avalanches due to a buried crust.
  • Be especially cautious as you transition into wind-affected terrain.
  • Cornice failures could trigger large and destructive avalanches.

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.