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Avalanche Forecast

Archived

Jan 13th, 2016–Jan 14th, 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.

Be suspect of small, new wind slabs at upper elevations from previous strong winds. The loose facets will continue to be a problem in confined features and terrain traps if initiated. SH

Weather Forecast

Temperatures will cool slightly for the next few days with little in the way of snow and NW winds staying mainly light. The next system with snow looks to be Saturday .

Snowpack Summary

In general there is 10-15 cm over the Jan 6 combination of surface hoar, facets and sun crust depending on aspect and elevation. Moderate to strong winds have formed small wind slabs in the alpine and can be found on most aspects. The snowpack is facetting but still supportive in this region where over a meter.

Avalanche Summary

A 1.5 on a South aspect over sun crust was reported in the Healy Paths near Sunshine yesterday. This is similar to other reports over the last few days in Little Yoho and the Banff region in Kootenay. As well, facet avalanches in extreme terrain are running far when initiated at all elevations.

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.