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Avalanche Forecast

Archived

Dec 2nd, 2021–Dec 3rd, 2021

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

Regions

Glacier.

A wicked, warm, wet storm has changed up the landscape. Dropping temperatures will help lower the hazard.

Weather Forecast

Temperatures are falling and precip is slowing down.

Tonight: Clear, Freeze level 1500m, light / gusting mod SW winds

Fri: Cloudy, FZL Valley Bottom, Alpine low -10*C, light SW winds

Sat: Cloudy with sunny periods, Alpine temp -11*C, light W winds

Sun: Cloudy with flurries, Alpine temp -16*C, light / gusting mod W winds

Snowpack Summary

On Thursday 10 cm of new snow at tree-line has fallen on 10 cm of moist snow. Rain soaked snow below tree-line will start to form a supportive crust by Friday. Below tree-line travel will be challenging has temperatures lower. The mid to lower snowpack is generally rounded and well bonded.

Avalanche Summary

No new natural avalanche observed on Dec 02.

Avalanche control on Dec 01 produced many avalanches up to size 3.5, some reaching valley bottom. Avalanches started moist and ended wet. Natural activity has backed off as the storm leaves the region and temperatures start to cool.

Confidence

Due to the number of field observations

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

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.