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Avalanche Forecast

Archived

Jan 29th, 2022–Feb 1st, 2022

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

Regions

Waterton Lakes.

Sunday: Variable snow surfaces creating challenging ski conditions. Expect a mixed bag.

Monday and Tuesday: Hazard will increase significantly throughout the day with 20 cm snow and extreme winds. Select terrain with conservative options.

Weather Forecast

Sun: Cloudy with flurries, accumulation 6 cm. Strong SW winds. Alpine high -5. Freezing levels valley bottom.

Mon: Cloudy with periods of snow, accumulation 16 cm. Moderate gusting to extreme W winds. Alpine high -5. FL VB.

Tues: Cloudy with flurries, accumulation 6 cm. Moderate NE winds. Alpine high -12, low -27. FL VB.

Snowpack Summary

Variable snow surfaces are found at all elevations. Jan 18 crust extends all aspects to 2000m. ALP consists of hard windslab in lees and stripped to ground in scoured areas. Well settled midpack over facets above Dec 4 crust, that is beginning to break down, buried 150-200 cm. A 20-60 cm thick Nov melt freeze crust complex completes the snowpack.

Avalanche Summary

Few size 1-2 windslab avalanches were seen in alpine and treeline this week. No new avalanches were observed on Saturday. Please post any avalanche observations on the Mountain Information Network, we really appreciate any observations.

Confidence

Intensity of incoming weather systems is uncertain

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.