Avalanche Forecast

Archived

Feb 16th, 2020–Feb 17th, 2020

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.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Regions

Glacier.

A meter of snow this week in alpine and treeline fetches is available for slab formation. Evaluate route choices carefully

Weather Forecast

Light flurries today with little snow accumulation, light W wind and an alpine high of -14. A ridge of relatively high pressure starts to set up today and tomorrow with winds continuing light W, temperatures falling and flurries until skies start to clear on Tuesday.

Snowpack Summary

20cm new snow overnight with moderate W wind. 95cm this week. Variable layers of resistance and sun crusts isolated to steep SW aspects reported within the storm snow over a strong snowpack of mostly rounds.

Avalanche Summary

Numerous natural avalanches to size 2.5 from all aspects this week with dust running far. Natural activity decreased yesterday.

Confidence

Due to the number and quality of field observations

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.