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Avalanche Forecast

Archived

Feb 19th, 2020–Feb 20th, 2020

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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Isolated wind slabs and the potential for solar-triggered avalanches require good spatial awareness today.

Weather Forecast

Sunny with cloudy periods and no precipitation today. Alpine temperature will reach -7 C with freezing level rising to 1200m. Expect light ridge wind.

A cold front arrives on Saturday bringing the next bout of precipitation. We are expecting 15cm of new snow for the weekend and gusty SW winds.

Snowpack Summary

There is 20-30cm of low density snow over a well settled mid-pack. Variable stubborn wind slab may be found in alpine elevations along ridge-tops and exposed tree-line features. Steep S to SW aspects have a suncrust buried anywhere between 30-60cm below the surface.

Avalanche Summary

No new avalanches were observed or reported yesterday.

Confidence

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.

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.