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Avalanche Forecast

Archived

Dec 27th, 2015–Dec 28th, 2015

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.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Little Yoho.

A few cm's of new snow will arrive on Monday to refresh the skiing. Enjoy the great conditions!

Weather Forecast

A bit of moisture will arrive on Monday as pacific air fights against polar air. Expect cloud and a few cms of new snow with tree line temperatures between -8 and -15. A high pressure system will take hold Tuesday bringing a return to clear skies and northerly winds.

Snowpack Summary

A well settled snowpack with few weaknesses exists throughout the region. Small isolated wind slabs exist on leeward slopes in the high alpine. Below 2000m, the Dec 3 layer of surface hoar remains visible and produces hard, planar test results in some areas but has not been reactive to skier traffic. Thin snow pack areas are beginning to facet out.

Avalanche Summary

Some sluffing and small natural cornice failures have been observed in really steep terrain due to the increasing winds moving the low density surface snow. Local ski areas have reported being able to ski cut small winds slabs in alpine lee areas.

Confidence

Due to the number and quality of field observations

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.