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Avalanche Forecast

Archived

Dec 26th, 2021–Dec 27th, 2021

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, 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.

Northerly winds have been reverse loading some features, watch for new slab formation along ridge lines and cross loaded features.

Weather Forecast

The Arctic ridge of high pressure has barged its way into the region like my boisterous Uncle Jack at our family dinners. Temps will be cold on Monday with an Alpine high of -20 with light Westerly winds and a mix of sun and cloud.

Cold temps, clear'ish skies and light winds are settling in for the week, Brrrr. Slight warming trend by the weekend.

Snowpack Summary

50cm of snow recent snow is settling out on top of previously faceted surfaces. Pockets of slab exist in loaded areas. The Dec 1 crust is buried approximately 70cm-120cm, with facetting of the snow directly above and below (facetting in most prominent in shallower snowpack areas). Beneath the Dec 1 crust, the snowpack is dense and strong.

Avalanche Summary

One size 3.0 avalanche out of the MacDonald Gullies and several other size 1.5 avalanches through the highway corridor within the last 24 hours.

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.