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Avalanche Forecast

Archived

Nov 23rd, 2019–Nov 24th, 2019

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

Regions

Jasper.

Forecast snow amounts are uncertain Saturday night into Sunday. If it exceeds expectations, expect the hazard to increase with the incoming wind and snow.

Weather Forecast

Saturday night will bring -6 °C., 12cm of snow, West winds 25 km/h gusting to 70 km/h. Sunday will be cloudy with sunny periods and isolated flurries, -7 °C., and West winds 20 km/h gusting to 70 km/h. Monday - Tuesday will be clear skies and cold.

For more details: Avalanche Canada's, Mountain Weather Forecast.

Snowpack Summary

Variable surfaces including crusts, hard wind press and loose snow sit above the Nov. rain crust which goes as high as 2200m. Total snow pack height in alpine is around 45-85 cm. A variety of surfaces in the alpine from wind pressed/scoured features to wind slabs in lee features in the alpine. Sheltered locations have formed Surface hoar.

Avalanche Summary

Hazard can be expected to increase in isolated areas where wind effect and loading is visible. No natural activity observed or reported in the forecast region. A system pushing in will likely elevate the avalanche activity and hazard.

Confidence

Forecast snowfall amounts are uncertain on Sunday

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.