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Avalanche Forecast

Archived

Dec 17th, 2016–Dec 18th, 2016

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

Regions

Little Yoho.

Incoming snow and wind is expected to increase the avalanche hazard by the end of this weekend, watch for the timing of the approaching weather system.

Weather Forecast

Warmer temperatures and new snow are forecasted to arrive on Sunday night/ Monday morning. This approaching system is expected to arrive with moderate to strong with at higher elevations.

Snowpack Summary

The low elevation snowpack is shallow and facetted, with a total depth of <100 cm up to almost 2000 m elevation. Above that, the snow becomes much deeper and stronger with recent test results showing no significant weak layers or shears in the snowpack. The incoming weather is expect to create a weak interface in the upper snowpack.

Avalanche Summary

No significant slab avalanches have been reported or observed in the past week. Loose snow avalanches (up to size 1.5) are occurring out of steeper terrain. Because of a faceted snowpack avalanche tend to run further then you may expect.

Confidence

Problems

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.

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.