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Avalanche Forecast

Archived

Feb 21st, 2020–Feb 22nd, 2020

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

Regions

Glacier.

Even in times of low avalanche hazard best practices of skiing exposed features one at a time are warranted.

Weather Forecast

A mix of sun and cloud today with an alpine high of -7C and moderate ridge top winds from the SW. Scattered flurries tonight through Sunday with possible accumulations of 15-20cm. This new snow will be accompanied by moderate SW winds shifting to light NE winds on Sunday.

Snowpack Summary

Strong sun followed by an overnight freeze will leave a crust on steep solar aspects. On shaded slopes expect 20-30cm of soft snow over a well settled mid-pack. Variable stubborn wind slab can be found in alpine elevations along ridge-tops and exposed tree-line features. Steep south aspects have a sun crust buried 30-60cm below the surface.

Avalanche Summary

Solar triggered slides up to size 2 were observed yesterday on steep solar aspects. Expect this to continue today with prolonged sun.

Confidence

Problems

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.

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.