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Avalanche Forecast

Archived

Feb 23rd, 2023–Feb 24th, 2023

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

Regions

Glacier.

Be alert for windslabs in the alpine and treeline. The best skiing can be found in sheltered areas at lower elevations.

Confidence

High

Avalanche Summary

Natural avalanche activity has tapered off in the wake of last weekends storm with only a few isolated small avalanches observed through the highway corridor. However, rider triggered avalanches remain a strong possibility.

Snowpack Summary

At alpine and treeline elevations the snow surface consists of wind affect and reactive windslab. On steep solar aspects this sits over several sun crusts. In sheltered areas below treeline recent storm snow is settled providing supportive good skiing.

The deep persistent weakness near the base of the snowpack has produced several large destructive avalanches in response to last weekends storm.

Weather Summary

Temperatures will gradually rise into the weekend as the next system arrives bringing more snow.

Tonight: Cold and clear, light E winds, Alp low -26*C

Fri: Mix of sun and cloud, moderate SW winds, Alp low -20*C

Sat: Cloudy, flurries up to 7cm, moderate SW winds, Alp low -17*C

Sun: Cloudy, flurries up to 7cm, light SW winds, Alp low -14*C

Terrain and Travel Advice

  • Avoid freshly wind loaded terrain features.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.

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.