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Avalanche Forecast

Archived

Jan 7th, 2022–Jan 8th, 2022

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

Regions

Glacier.

Ongoing flurries and strong winds will keep storm slabs reactive through the weekend. Minimize your exposure to avalanche terrain.

Weather Forecast

A warm front passing to the North gives ongoing flurries, warming temps and strong wind.

Tonight: Isolated flurries. Alpine Low -21*C. Strong Southwest ridge winds.

Saturday: Flurries (5cm). High -13*C. Strong SW wind.

Sunday: Flurries (5cm), sunny breaks PM. Low -12*C, High -2*C. Strong W wind.

Monday: Sunny periods, Low -7*C, High -3*C, Mod SW wind.

Snowpack Summary

Up to 65cm of fresh storm snow has fallen, with up to 10 cm more forecast to fall by Saturday evening. New snow, warming temps and strong gusty wind is building fresh slabs over the cold snow below. The Dec 1 crust (now buried up 2m deep) has not been reactive lately, despite having faceted snow above and below it (especially in shallow areas).

Avalanche Summary

A widespread natural and artillery controlled avalanche cycle occurred Friday morning. Avalanches up to size 3 were reaching the valley floor.

A lower elevation (1450m starting zone) slab avalanche ran size 3 on Friday in Mt Revelstoke park, and covered the closed Trans-Canada highway - this occurred in an infrequently active avalanche path.

Confidence

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

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.