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Avalanche Forecast

Archived

Dec 6th, 2024–Dec 9th, 2024

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

Regions

Waterton Lakes, Waterton.

Strong winds and new snow overnight on Saturday are likely to build reactive wind slabs in lee features.

Confidence

Moderate

Avalanche Summary

No new avalanches observed.

Snowpack Summary

A new melt freeze crust has formed on solar slopes at all elevations with warm temps this week. This overlies old windslab and settling early season snow. Snow depth at treeline 80-120 cm. There is a basal crust 10-20cm off the ground.

Weather Summary

Sat

Cloudy with snow beginning in the afternoon, 10 - 20 cm by Sunday morning. Ridgetop winds 70 - 90 km/hr from the SW. Alpine high around 0°C.

Sun

Flurries clearing in the morning, ridgetop winds 60 - 80 km/hr. Temperatures dropping to -10°C overnight.

Mon

Flurries, alpine high of -7°C. Wind decreasing slightly to 50 - 60 km/hr.

Check out the Mountain Weather Forecast for the most up to date information.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected 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.