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Avalanche Forecast

Archived

Jan 9th, 2026–Jan 10th, 2026

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

Regions

Glacier.

Continued snowfall over the past week has left us with approximately 100cm of snow over a persistent weak layer.

Stick to conservative lines until the new snow has had time to settle and bond.

Confidence

Moderate

  • Uncertainty is due to whether buried persistent weak layers become active, triggering avalanches, with the arrival of the forecast weather.

Avalanche Summary

Reports of human trigged size 1 wind slabs at treeline on Friday. Multiple Sz 2 Natural avalanches also observed Macdonald W.

Limited alpine observations over the last few days but neighbouring operations have reported skier triggered persistent slab avalanches up to size 2 on buried surface hoar or a crust.

Tues- a widespread natural avalanche cycle occurred up to size 2.5. Artillery avalanche control in the highway corridor produced numerous size 3-3.5 avalanches.

Snowpack Summary

Recent snowfall totals of up to 100 cm were accompanied by moderate to strong winds. This has formed wind slabs in the alpine and on exposed slopes at treeline.

Below this weeks storm snow, a layer of surface hoar is buried 60-100cm deep in sheltered areas at treeline & below. On solar slopes, the storm snow sits over a crust which is also acting as failure plan for human triggered avalanches.

The lower snowpack is well settled.

Weather Summary

Tonight Isolated flurries - trace precipitation. Alpine Low -8°C. Winds SW 30- 46 km/h. Freezing level (FZL) 900m .

Sat Isolated flurries - trace precipitation. Alpine high -4°C. Winds SW 35 gusting to 65km/h. FZL 1200m.

Sun Snow, 25 cm. Alpine high -4°C. Winds SW 35km/h. FZL 1200m.

Mon Heavy snowfall, 30 cm. Alpine High -3°C. Winds W 20-35km/h. FZL 1600m.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.
  • Don't let the desire for deep powder pull you into high consequence terrain.

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.

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.