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Avalanche Forecast

Archived

Apr 12th, 2021–Apr 15th, 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, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Waterton Lakes.

Excellent alpine skiing in the area at the moment with up to 40cm of new snow. The new snow is hiding hazards such as previous wind slabs and rocks.

Weather Forecast

Tues: Sun, Cloud and flurries. Alpine -7. Light to moderate NE wind. Freeze levels 1400m.

Wed: Same forecast as Tuesday.

Thurs: Sun cloud and flurries. Freeze level 1700m

Avalanche Canada's Mountain Weather Forecast is a great regional-scale resource for up-to-date weather information. SPOTWX is a good resource for local scale weather forecasts.

Snowpack Summary

Up to 40cm of recent low density snow at treeline and above with minimal wind effect. This sits on a supportive crust that exists to ridgetop except on high north faces. Overall a well consolidated snowpack with the lower half composed of dense facets and decomposing crusts, which haven't produced test results or recent avalanches.

Avalanche Summary

No new slab avalanches reported or observed. A couple loose dry avalanches (Size 1) out of the steep cliffy terrain on Mount Blakiston were directly observed on Monday.

Please consider submitting a MIN report if you see an avalanches.

Confidence

Freezing levels are uncertain on Thursday

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.