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Avalanche Forecast

Archived

Feb 21st, 2022–Feb 22nd, 2022

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

Wind effect in the tree line was observed more significant than anticipated. Wind slabs are forming in unusual spots due to reversed loading. Cooler temperatures are expected to stabilize the snowpack into the week.

Weather Forecast

Tuesday:Sunny with cloudy periods.Precipitation: Nil.Alpine temperature: High -19 °C.Ridge wind northeast: 10 km/h.Freezing level at valley bottom.

Wednesday:A mix of sun and cloud with isolated flurries.Precipitation: Trace.Alpine temperature: Low -19 °C, High -17 °C.Ridge wind west: 10 km/h.Freezing level at valley bottom.

Snowpack Summary

New and old wind slabs created over the last week. Latest Northerly winds contributing to reversed loading. Weak temperature crust up to 1900m and solar crust on solar aspects up to 2800m. December facets down 20-70cm, showing signs of rounding within bulletin region. Basal facets & depth hoar present throughout area.

Avalanche Summary

No Patrol on Monday. Patrol in the Icefields and Maligne area did not observe any natural avalanche activity on Sunday.

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.