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Avalanche Forecast

Archived

Jan 1st, 2022–Jan 2nd, 2022

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

Regions

Glacier.

Keep a close eye on wind values. There is a lot of snow available for transport!

Expect the avalanche danger to increase as the storm progresses.

Weather Forecast

A brief reprieve from the arctic air with the arrival of a frontal system tonight.

Tonight: 6cm snow. Wind SW-50km/h. Alpine Low -17C.

Sunday: 9cm snow. Wind S-35km/h. Alpine high -11C.

Monday: 13cm snow. Wind SW-45 km/h. Alpine high -8C.

Snowpack Summary

The upper snowpack continues to weaken with the cold temps. Small pockets of windslab (5-30cm thick) exist at the surface of all elevations along ridge-crests, and in open features exposed to down-flowing winds. The Dec 1 crust is buried 70-120cm, with weak, sugary snow above and below it (especially in shallow areas).

Avalanche Summary

No new avalanches were observed in the highway corridor today.

On Friday, tree bombs triggered a few small loose dry avalanches, and one size 2.0 windslab on solar aspects.

Thursday, a cornice fall triggered a small (size 1.5) windslab in the Connaught slidepath.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

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.