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Avalanche Forecast

Archived

Feb 6th, 2022–Feb 7th, 2022

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

Regions

Glacier.

Extreme winds and snow forecasted for Monday will likely keep you out of the alpine and enjoying the quality tree skiing on polar aspects.

Weather Forecast

Strong to extreme (30-85km/hr) Westerly winds forecasted for Monday as a Pacific Party front plows its way into our region, delivering another 10-15cm as it passes through. Temperatures will gradually drop with an alpine high of -6 and a freezing level of 1200m. Winds easing off slightly on Tuesday and temperatures rising again on Wednesday.

Snowpack Summary

On Sunday, a new sun crust formed on steep solar aspects and will be buried by the incoming snow. Wind slabs exist in some locations in the alpine and down into tree line. The Jan 29 interface (surface hoar 5-15mm in sheltered areas and sun crust on steep solar) is buried 50-80cm. The Dec 1 crust/facet combo is down 1.5-2.5m.

Avalanche Summary

Numerous sz 1-1.5 and several sz 2-2.5 point release avalanches on Sunday out of steep, rocky, sun exposed terrain. As well as a skier triggered sz 1.5 storm slab in the Pearly Rock area from a thin, rocky area.

A skier controlled size 2.0 storm slab in the Hospital Bowl area on Saturday, 20-40cm deep, 20m wide and running ~100m. 

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.