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Avalanche Forecast

Archived

Jan 8th, 2022–Jan 9th, 2022

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

Regions

Glacier.

Yesterday's storm slab is today's wind slab.

New snow, warming temperatures and increasing winds will promote slab formation. Use caution entering wind affected terrain.

Weather Forecast

To shred or not to shred?... is that even a question!?

Another 5-10cm by Sunday morning and a mix of sun and cloud with isolated flurries for the day. A warm front is moving into the region bringing increasing temperatures with an alpine high of -4 and 25-50km/hr South winds. Expect sunny skies on Monday and the 'return of the snow' by Tuesday.

Snowpack Summary

60cm of recent low density snow with 25-50km/hr SW winds is forming new wind slabs. The warming temps will promote settlement of the low density snow. The Dec 1 crust (now buried up to 2m deep) remains dormant, despite having faceted snow above and below it. The mid-lower snowpack is settled and strong.

Avalanche Summary

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

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

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.