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Avalanche Forecast

Archived

Feb 18th, 2013–Feb 19th, 2013

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

Regions

Kananaskis.

Storm snow instabilities should improve slightly on Tuesday, but another storm of 10cm+ approaching Tuesday night could cause the danger level to rise again.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain

Weather Forecast

Light SW winds expected Tuesday with light precipitation. Alpine temperatures will reach -12. More significant precipitation amounts are likely on Tuesday night into Wednesday.

Avalanche Summary

Sluffing in steep terrain continues on all aspects at all elevations up to size 2.0, more prominent on solar aspects.

Snowpack Summary

Variable new snow amounts of 4 to 8cm overnight. Moist snow on steep solar aspects. Storm snow totals are near 20 to 25cm. Variable wind affect in alpine features with some snow loading and soft slab development occurring in isolated terrain. Sluffing in steep terrain continues on all aspects at all elevations up to size 2.0.

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.