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Avalanche Forecast

Archived

Mar 26th, 2020–Mar 29th, 2020

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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Waterton Lakes.

Windslab will continue to develop in to the weekend. This is not the time to push the conditions as the healthcare system continues to deal with COVID19.

Weather Forecast

Friday: Cloudy with isolated flurries. West wind 50km/h gusting to 70.  Freezing level 1600m.

Saturday: Cloudy with wet flurries. Moderate SW wind with strong gusts.

Sunday: Cloudy with wet flurries. Moderate SW wind with strong gusts. 5 cm snow accumulation.

Snowpack Summary

5-10 cm of storm snow has been redistributed by Moderate - Strong SW winds. This has created fresh windslabs which sit over a melt freeze crust on all but North aspects. The mid pack is strong and well settled. Basal instabilities haven't been seen in some time, but are likely lurking in thin areas.

Avalanche Summary

Avalanche activity in the last week has mainly been limited to loose wet avalanches up to size 1 on solar aspects with daytime warming.

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 Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.