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Avalanche Forecast

Archived

Dec 15th, 2016–Dec 16th, 2016

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

Regions

Little Yoho.

Winds are expected to pick up on Friday. Watch for fresh windslabs.

Weather Forecast

Continued cold temperatures (with a slight temperature inversion) through to Saturday with a slight warming trend starting Sunday. Winds are forecasted to increase on Friday and becoming strong from the north-west on Saturday. Light amounts of snow forecast starting Saturday night.

Snowpack Summary

The low elevation snowpack in the Little Yoho region 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.

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.

Confidence

Wind speed and direction is uncertain

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.