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Avalanche Forecast

Archived

Nov 12th, 2012–Nov 13th, 2012

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

Glacier.

The Winter Permit System is not yet in effect. Expect sporty early season conditions with thinly buried hazards at lower elevations, open creeks and lots of alder. Dry powder can be found on sheltered slopes about 1800m.

Weather Forecast

Unsettled weather with cool temperatures, flurries, and moderate westerly winds at ridgetop are forecasted. Freezing levels are expected to stay below 1300m.

Snowpack Summary

Above 1800m 40cm of snow overlies a series of crusts. Stability tests find moderate resistant planar shears above the Nov 6 crust.  Moderate to strong winds from the SW and the NE transported snow and formed isolated windslabs in the alpine. 

Avalanche Summary

Recent avalanche activity has been limited to sluffing off of steep slopes.

Confidence

Due to the number of field observations

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.