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Avalanche Forecast

Archived

Mar 18th, 2022–Mar 19th, 2022

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

Regions

Jasper.

There is still potential for avalanches to be triggered at Tree Line elevations if there is a Wind Slab present. Proper judgement and assessment is still necessary even with the hazard rating of Low.

Weather Forecast

Saturday

Cloudy with scattered flurries.

Accumulation: 4 cm.

Alpine temperature: High -3 °C.

Ridge wind southwest: 15-35 km/h.

Freezing level: 1900 metres.

Sunday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -12 °C, High -10 °C.

Ridge wind west: 20-40 km/h.

Freezing level at valley bottom.

Snowpack Summary

Parkers Ridge received up to 35cm between March 12-15 which buried a variety of surfaces including wind scoured surfaces and hard slabs. The new snow has formed a wind slab in the Alp and TL. Feb 13 interface down 20-50, present as Melt Freeze crust on solar aspects or DF interface on polar aspects with profiles showing resistant results..

Avalanche Summary

Tuesdays avalanche control highway 93 south produced up to size 1.5 wind slab averaging 30cm deep. A few size 1.5 dry loose observed in steep alpine terrain. Ski cut on an steep, unsupported feature in the Maligne range produced a size 2 on a hard wind slab.

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.