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Avalanche Forecast

Archived

Mar 9th, 2015–Mar 10th, 2015

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, 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.

Regions

Glacier.

Above freezing overnight temperatures at 1900m will have prevented the crust to fully recover. If the sun shines, any direct solar radiation today will increase the avalanche hazard on solar aspects.

Weather Forecast

A weakening high pressure ridge over the southern half of the interior will keep things mostly dry with increasing cloud for today. Freezing levels will reach between ~1700-2000m. Light flurries and/or rain can be expected later today. Alpine winds are not expected to relent much, they will be 50-60km/h from the west today.

Snowpack Summary

Firm crust below treeline at the surface softening with mild temperatures. Variable conditions higher up from wind deposited powder, to stiff wind slab, to bare crust. Reactive wind slab may exist at ridge crests. Recently buried surface hoar with variable distribution is down ~15cm. This sits just above the Feb 14 crust which is ~5-10cm thick.

Avalanche Summary

No new natural avalanches have been observed yesterday.

Confidence

Timing or intensity of solar radiation is uncertain

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.