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Avalanche Forecast

Archived

Nov 27th, 2013–Nov 28th, 2013

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

Regions

Glacier.

There is still an inversion in the area. Be mindful of warmer temperatures in the alpine affecting steep, solar aspects.

Weather Forecast

The ridge of high pressure will prevail for one more day, with sun, alpine temp's around -1*C, and light ridge-top winds. Thursday and Friday will see scattered flurries, continuing mild temp's, and light ridge-top winds.

Snowpack Summary

Snowpack has settled quite a bit since the storm exposing more early season hazards. Sun crusts exist on steeper south/southwest aspects. A field team in the Bruins Pass area noted moderate test results on the November 12 surface hoar layer, which is down between 50-110cm at higher elevations. Wind-pressed soft slab prevalent coming down 8812 Bowl.

Avalanche Summary

No new significant activity observed from previous 24 hours. Evidence in the Connaught drainage of an extensive cycle to size 3 during last week's storm. Old crown lines observed on N-facing slopes off of Cheops and Pk 8812 with debris traveling well into the fans.

Confidence

Due to the number and quality of field observations

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.