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Avalanche Forecast

Archived

Feb 27th, 2016–Feb 28th, 2016

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

Glacier.

The snowpack is stabilizing but large avalanches are still possible. Careful group management and regular caution are required for safe travel under these conditions.

Weather Forecast

A short break between frontal systems today. Mainly cloudy, isolated flurries and trace amounts of accumulation. Freezing levels rise to 1600m with an alpine high of -3. West winds 20km/h gusting to 50km/h at ridge top. The next front arrives tomorrow morning with strong SW winds and up to 15cm of new snow. Freezing levels remain below 1600m.

Snowpack Summary

8cm of new snow sits on a breakable crust on SE through W aspects and widespread surface hoar. Soft slabs in the upper 50cm can be found near ridge crests, but are more stubborn to move now. The February 10th surface hoar / sun crust is down 50-90cm and is much less reactive than a few days ago.

Avalanche Summary

Yesterday there was an isolated natural avalanche cycle of loose solar triggered avalanches on steep, south-southwest facing slopes up to size 2.

Confidence

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.