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

Regions

Kananaskis.

As winds begin to increase will likely likely see an increase in loose dry avalanches and stiffening wind slabs.  We are on the cusp of a change.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Monday

Weather Forecast

Tomorrow we will see the blue sky begin to be pushed out slightly and more SW flow returning to the region.  Winds will increase with the arrival of the warmer temperatures (-16c) and beginning late on Sunday night we can expect to see some precipitation FINALLY fall here again.  Forecast amounts differ but roughly 10cm of snow should be expected based on the weather models on saturday eve.

Avalanche Summary

Only a few loose dry slides up to sz 1 were observed on Saturday out of steep unskiable terrain.

Snowpack Summary

Expect to encounter windslabs in open terrain in the alpine and at treeline and some un-distrubed snow in more sheltered areas. The 1112cr is down 50-70cm and producing variable results often within a few meters so be sure to evaluate this layer. The cold temps have certainly taken their toll on lower snowpack areas and they are weak and facetted.

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.