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Avalanche Forecast

Archived

Jan 30th, 2013–Jan 31st, 2013

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

Overnight rising winds and lots of available soft snow have created avalanche conditions. Use caution when crossing avalanche runnouts as avalanches are running full path.

Weather Forecast

NW flow brings cloudy skies today. Thursday and Friday very light to nil snow.

Snowpack Summary

Up to 55cm of low density new snow. Jan 23 layer is down 65cm. This layer is a sun crust on steep south and west aspects and surface hoar to 9mm below 1800m. The Nov 6 crust is down 200cm. Watch for power sluffing in steep terrain and soft slabs running to valley bottom.

Avalanche Summary

Overnight avalanches have been running to the end of their runnouts up to size 3.0.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Problems

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.

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.