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Avalanche Forecast

Archived

Dec 26th, 2024–Dec 27th, 2024

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

Regions

Glacier.

Steady snow and wind have created windslabs in the alpine and exposed areas at treeline. Use caution as you transition into wind affected terrain.

The best snow quality still exists in wind sheltered areas.

Confidence

Moderate

Avalanche Summary

There was a small natural avalanche cycle overnight in steep start zones that was likely triggered by a wind spike.

Reports have been trickling in of wind effect and shooting cracks in alpine terrain. The operations around us are also reporting a mix of wind slab and stormslabs as well as sluffing in steep terrain.

Snowpack Summary

Continuous snowfall the past week has brought 90+cm. Mod to strong S/SW winds formed a reactive wind slab in specific features (ridge lee areas, open cross-loaded slopes, convex rolls).

Sheltered slopes hold excellent skiing.

A persistent weak layer is down 90-120cm. This interface is breaking down, but consists of surface hoar in sheltered locations, and a sun crust on solar aspects. The snowpack's base is comprised of several early-season melt-freeze rain crusts

Weather Summary

A series of low intensity storms will affect the region over the next few days.

Tonight Isolated flurries, trace amounts, Alp low -8°C, South winds 30 km/h, freezing level (FZL) 900m.

Fri Sun/cloud/flurries, trace snow, Alp High -7°C, light wind gusting 30km/h, FZL 1000m.

Sat Flurries, 10cm, Alp High -5°C, SW winds 35-40km/h, FZL 1200m

Sun Flurries, Trace snowfall, Alp High -7°C, winds light SE, FZL 1100m.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Wind slabs are most reactive during their formation.

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.