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Avalanche Forecast

Archived

Feb 10th, 2013–Feb 11th, 2013

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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Kananaskis.

Steep south facing slopes could see a more rapid increase in avalanche hazard on Monday if weather forecasts come true. Be aware of overhead terrain and avoid terrain traps during periods of intense solar radiation.

Confidence

Good

Weather Forecast

Alpine temperatures will be warm overnight with a high near -3 degrees. Winds are expected to increase 70km/h out of the NW at ridgetop. A very small wave of precipitation is possible on Tuesday.

Avalanche Summary

Nothing new.

Snowpack Summary

Moist snow on steep S and SW aspects in afternoon. Up to 20cm of recent snow in alpine areas remains low density except in wind prone areas. Previously formed hard slabs are still a concern in steep, convex terrain especially in shallow snowpack areas. At lower altitudes the snowpack continues to loose strength due to facetting.

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.

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.