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Avalanche Forecast

Archived

Jan 8th, 2017–Jan 9th, 2017

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

Look to protected locations for the best ski quality.  Days are still short, plan your turn around time to be back to the trail head well before dark.

Weather Forecast

Today's forecast calls for cloudy with sunny periods and an alpine high of -7C.  Ridgetop winds should be light and from the SE.  Later today a Pacific front should move in bringing upwards of 15cm of storm snow by Monday afternoon.  Warming temps, snowfall and occasionally gusting winds will see a rise in the avalanche danger for Monday.

Snowpack Summary

New Years N'ly winds left exposed slopes at and above treeline wind pressed. In more protected locations these slabs may rest on top of the Dec 26th surface hoar layer. The Dec 18th facet/surface hoar layer down 50-80cm is producing hard results in field tests with varying fracture character. Surface faceting is building the next weak layer.

Avalanche Summary

Last Wednesday skiers accidentally triggered a size 1.5 windsslab on a SW aspect at 2350m in the Hermit area. Since then there has been little natural avalanche activity observed or reported.

Confidence

Intensity of incoming weather systems is uncertain

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.