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Avalanche Forecast

Archived

Nov 12th, 2020–Nov 13th, 2020

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 are very present at the moment. Watch out for wind slabs in unexpected places due to variable winds. 

Weather Forecast

Friday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. High -7 °C. Ridge wind southwest: 10-30 km/h. Freezing level at valley bottom. Saturday: Mainly cloudy with scattered flurries. Accumulation: 4 cm. Low -14 °C, High -6 °C. Wind west: 15 km/h gusting to 40 km/h. Freezing level at valley bottom.

Snowpack Summary

Treeline has a snowpack of 40-50cm with overall supportive travel. 5cm of recent snow has settled quickly. The Nov. 4th rain crust exists up to 2600m depending on location in the forecast area. Variable winds have formed wind slabs at ridge tops.

Avalanche Summary

No new avalanches have been observed or reported.

Confidence

Due to the number 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.