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Avalanche Forecast

Archived

Dec 26th, 2016–Dec 27th, 2016

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

Regions

Glacier.

Isolated storm slabs should keep you on your toes, be vigilant, exercising caution as you investigate each slope independently.

Weather Forecast

Snow will develop later today with light accumulations approaching 5 possibly 10 cm by late this evening. Temps remaining cool with Alpine high of -13 and light-mod SW winds. Another 5-10cm is forecasted for Tuesday with precip tapering off Wednesday with incremental loading.

Snowpack Summary

Last week's storm brought significant amounts of precipitation @ TL. This overlies a weak facetted layer and surface hoar in isolated locations, which we're calling the Dec 18th interface. This will be the layer to monitor as the next pulse of precipitation arrives tonight and tomorrow. The November 13th Cr has been unreactive to stability tests.

Avalanche Summary

Yesterday on Video Pk a skier remote size 2 slab avalanche was observed and several size1 loose dry when the sun came out above the valley fog. No new avalanches observed in the highway corridor.

Confidence

Forecast snowfall amounts are uncertain on Tuesday

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.