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Avalanche Forecast

Archived

Feb 4th, 2021–Feb 5th, 2021

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

Regions

Jasper.

Excellent skiing can be found at tree line and below. Watch for hazards in the alpine such as cornices and recently formed wind slabs.

Weather Forecast

Friday: Cloudy with sunny periods and isolated flurries. High -9. Wind northwest: 15 km/h gusting to 60 km/h

Saturday: Cloudy with scattered flurries. 4cm.  Low -27C, High -12C. Ridge wind light to 20 km/h.

Sunday: A mix of sun and cloud. Low -29 °C, High -23 °C. Light Ridge Winds.

Snowpack Summary

40-60cm with minimal wind effect. This new snow overlies surface facetting, previous wind effect and surface hoar depending on location.  Well settled mid-pack characteristic for the region except in typical shallow locations. Variable HS (90-200cm) throughout the area.

Avalanche Summary

A determined avalanche control team worked hard Tuesday to produced a few good results, up to size 2.5 on a very stubborn storm interface in low elevation targets with several large triggers. No new avalanches observed since avalanche control on Tuesday. 

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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.