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Avalanche Forecast

Archived

Nov 7th, 2019–Nov 8th, 2019

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

Regions

Jasper.

Early season hazards such as rocks and vegetation lurk under a shallow weak snowpack. Ice climbers are most vulnerable to loose dry avalanches in gulleys and terrain traps where the ice forms.

Weather Forecast

Forecasted new precipitation totalling 26mm expected in the Ice fields, starting Friday morning and steadily building over the weekend. Temps will remain below freezing above 1700m with highs of -1 and a low of -10.

A detailed forecast can be found from Avalanche Canada's, Mountain Weather Forecast.

Snowpack Summary

Expect to find an early season snowpack with fickle support under foot/ski and hidden hazards like rocks and vegetation. Generally, the snowpack structure will be extremely variable in the forecast region. A thin October crust has been observed in the ice fields with some evidence of an active, soft wind slab from steep terrain in the Alpine.

Avalanche Summary

Wide spacial variation through the region with most areas still below threshold for travel. Rideable snow may be found at Tree Line and in the Alpine with buried and new developing wind slabs possible at ridge tops and open areas. All back country users (including you ice climbers!) should be carrying avalanche safety gear.

Confidence

Due to the number and quality of field observations

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.