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Archived

Avalanche Forecast

Jan 22nd, 2022–Jan 25th, 2022
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Waterton Lakes.

Alpine inversions and high freezing levels are forecasted throughout the start of the week.

Minimize overhead hazard wherever possible. Cornices weaken with high alpine temperatures.

Weather Forecast

Sun: Cloudy. Strong W winds. Alpine temperature inversion with an alpine high of -1.

Mon: Cloudy with scattered flurries, accumulation 4 cm. Moderate W winds. Alpine high -6. FL valley bottom.

Tues: Mainly cloudy with isolated flurries. Strong SW winds. Alpine temperature inversion, high -8.

Snowpack Summary

A hard rain crust exist on all aspects up to 2000m. Alpine surfaces range from hard windslab in lees and to bare ground. Well settled midpack. Facets above Dec 4 crust down 150-200 cm. A 20-60 cm thick Nov crust complex completes snowpack to ground.

Avalanche Summary

Few natural windslab avalanches, size 1 - 2, observed in park today likely triggered by solar input this afternoon. Thanks to everyone posting on the Mountain Information Network, keep up the great work, we really do read them.

Confidence

Freezing levels are uncertain

Avalanche Problems

Persistent Slabs

Strong alpine inversions and high freezing levels will test persistent layers and cornices in sheltered alpine features . Minimize overhead hazard as temps at higher elevations are likely warmer than valley bottoms.

  • Pay attention to overhead hazards like cornices which could easily trigger persistent slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2.5 - 4

Cornices

Alpine inversions may cause cornices to weaken. Cornice triggered avalanches could step down to persistent weak layers.

  • Avoid travel on slopes that are exposed to cornices overhead.
  • Pay attention to overhead hazards like cornices; which could trigger large avalanches.

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 4

Wind Slabs

Few natural avalanches size 1 - 2 seen steep alpine terrain around park on Saturday, Jan 22, likely triggered by solar input.

  • Be careful with wind loaded pockets, especially in steep confined alpine terrain.

Aspects: North, North East, East, South East, South, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2