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Avalanche Forecast

Archived

Dec 6th, 2018–Dec 9th, 2018

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

A semi supportive crust makes skiing possible in some locations but access is difficult.

Weather Forecast

Wind increasing to 50 km/h Friday afternoon and continuing through the weekend. We may see up to 5 cm of snow on Saturday but the models are in disagreement. Freezing level rising to Tree Line on Sunday.

Snowpack Summary

20-50 cm of snow is on the ground in the area surrounding Cameron Lake. 5-10cm of recent snow will form new windslabs in the alpine and at tree line as winds increase Friday afternoon. The Nov 5 Melt freeze crust is present below 1950m on all aspects. Many areas are still below threshold.

Avalanche Summary

One Natural Size 1 Wind Slab at 2000m on N aspect of Mt. Custer (Cameron Lake). This is the only avalanche observation for the Akamina Parkway with excellent visibility.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Friday

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.