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Avalanche Forecast

Archived

Feb 13th, 2022–Feb 14th, 2022

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

Regions

Glacier.

Travel is fast, but skiing is challenging! Wind affect, crusts, and treebombs galore...

Allow extra time for your egress.

Weather Forecast

Unsettled conditions for the foreseeable future means cloudy skies and not much snow...

Tonight: mainly cloudy, no precip. Alpine low -5*C, freezing level (fzl) 800m. Wind light-south.

Monday: isolated flurries, trace of snow. High -4*C, fzl 1500m. Wind light-W

Tuesday: isolated flurries, trace of snow. High -7*C, fzl 1100m. Wind light-W

Snowpack Summary

Surface hoar to size 8mm has been observed growing on the old hard surfaces at treeline and below. Last week extreme South winds created widespread wind effect. Strong solar formed a crust into the alpine on solar aspects, and on all aspects below 1650m. The Jan 29th SH layer is buried 50-80cm, and is 5-15mm in size depending aspect and elevation.

Avalanche Summary

One size 2.0 loose avalanche was observed from a steep south-facing path today, in the highway corridor.

There were a few size 2-2.5 avalanches triggered by warming in the highway corridor and in the backcountry on Thursday.

There were several reports of skier triggered avalanches last week, several confirmed to have failed on the Jan 29 Surface Hoar

Confidence

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

Problems

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.