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Avalanche Forecast

Archived

Mar 22nd, 2021–Mar 23rd, 2021

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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Small amounts of new snow are adding up to some great winter-like skiing.

Lookout for recent wind loading and sluffing in steep terrain.

Weather Forecast

Tuesday: Cloudy with sunny periods and isolated flurries. Precip: Trace. Alpine temperature: High -9 C. Ridge wind west: 15-35 km/h. Freezing level at valley bottom.

Wednesday: Cloudy with sunny periods and isolated flurries. Precip: Trace. Alpine temperature: Low -10 C, High -6 C. Ridge wind west: 15-35 km/h. Freezing level: 1500 metres.

Snowpack Summary

Up to 25cm new snow from convective flurries over past few days, redistributed by SW winds TL/ALP, overlies a variety of sun crusts on solar aspects up to ALP. The overall snowpack is variable at TL and above with a supportive strong 1F to P midpack in the deeper areas to a weak facetted midpack in shallow areas.

Avalanche Summary

Patrol in the Icefields area observed couple sz 1 wind slab avalanches in ALP wind loaded features.

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.