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Avalanche Forecast

Archived

Jan 23rd, 2021–Jan 24th, 2021

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

Regions

Glacier.

Generally safe avalanche conditions, but watch out for unstable snow on isolated terrain features like steep solar aspects and near cornices. 

Please leave plenty of time to get back to the trailhead safely. 

Weather Forecast

Clear skies, cool temperatures, and light westerly winds are forecasted for today. Alpine temperatures will reach -12c, and will fall back to near -14c overnight.  The stationary ridge that brought sunny skies will be breaking down tonight, making way for light flurries. Temperatures will remain cold into next week.

Snowpack Summary

Strong to extreme southerly winds created widespread wind effect in the Alpine and at Tree Line. The wind created scouring as well as localized hard slabs and cornice growth. Recently formed cornices may be fragile. Steep solar slopes are now topped with a thin sun crust. In sheltered locations one can find low-density storm snow on the surface.

Avalanche Summary

No new avalanches were observed in the highway corridor. A group reported a natural cornice failure on the N aspect of Glacier Crest that did not initiate a slab on the slope below.

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.