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Avalanche Forecast

Archived

Dec 12th, 2020–Dec 15th, 2020

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

Regions

Waterton Lakes.

ncreasing winds over the next few days will form wind slab in lee areas that may not bond well to the underlying crust. Take the time to investigate as you transition into to wind affected areas.

Weather Forecast

Sunday: Increasing cloud and winds through the day from the southwest up to 50km/h at ridgetop. Temperatures around -9.

Monday: Mainly cloudy with isolated flurries and moderate west winds. Alpine high -10

Tuesday: Light snow, with winds dramatically increasing to 90km/h at ridgetop form the west. Alpine high -9

Snowpack Summary

In the Cameron lake area, 10-20cm of faceted storm snow sits above a crust, and will be blow into new windslabs. A well consolidated midpack sits above a thick ice crust that forms the bottom of the snowpack. Treeline snow depth in the Cameron lake area just over 1m with amounts tapering quickly at lower elevations and in other areas of the park.

Avalanche Summary

No recent avalanches observed

Confidence

Due to the number of field observations

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.