Avalanche Forecast
Issued: Dec 28th, 2013 8:21AM
The alpine rating is Wind Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Intensity of incoming weather systems is uncertain on Monday
Weather Forecast
Sunday: Another series of weather systems starts to affect the interior. Light snowfall, alpine temperatures -6, winds light to moderate from the northwest.Monday: Light to moderate snowfall, Alpine temperatures -5, freezing level at 1200m, winds light west.Tuesday: Mainly cloudy with isolated flurries. Alpine temperatures -5 and freezing level at 1200m.
Avalanche Summary
A few slab and loose avalanches to size 1.5 have been reported in the last 2 days. These are isolated to the most recent storm snow.
Snowpack Summary
Recent Moderate to strong west and southwesterly winds have built new wind slabs in alpine and treeline lees. 30-50 cm of storm snow sits on a weak layer consisting of surface hoar crystals, stellar crystals and/or crust. Around 60-90 cm below the snow surface, the early December surface hoar, facetted snow, and/or a crust interface sits and has been reportedly more stubborn to rider triggers. The late-November persistent weak layer consists of a sun crust on steep south facing slopes and surface hoar in sheltered areas. It is now buried 80-110cm below the surface. Snowpack tests vary on this interface with some results producing "sudden" shears and others producing no results. This interface is generally considered to be dormant. However, professional operators are keeping a close eye on it.A weak layer of facets sitting on a crust that formed in October, sits near the base of the snowpack. This layer is predominantly found on north-facing alpine slopes with smooth ground cover. Triggering this weakness is unlikely, however if triggered the resulting avalanche would potentially be a large event with high consequences.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 29th, 2013 2:00PM