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Archived

Avalanche Forecast

Dec 13th, 2021–Dec 16th, 2021
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Waterton Lakes.

Cautious skiing is possible above 1800m. Choose lines carefully.

Weather Forecast

Tuesday: 10cm of snow expected overnight, partially cloudy. Moderate winds at ridgetop . Alpine temps High -3. FL valley bottom.

Wednesday: Partially cloudy no precip expected today. Alpine temps High - 8. Moderate W winds. FL valley bottom.

Thursday: Partially cloudy with PM flurries. Alpine temps High - 6. Moderate SW winds. FL valley bottom

Snowpack Summary

5-15cm unconsolidated snow overlies a 20-40cm windslab ALP/TL atop a 10cm Dec 4 rain crust with facets below. A 20-60 cm thick Nov melt freeze crust complex completes the snowpack to ground. BTL has just reached threshold in some places. HS at TL is 100 - 170 cm deep.

Avalanche Summary

No new avalanches observed with good visibility. Observations in this area are still limited, if you go out into the mountains please share your observations on the Mountain Information Network.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

A 20 to 40cm windslab sits on the Dec rain crust.

  • Use caution in lee areas. Recent wind loading have created wind slabs.
  • Use caution on steep lee and cross-loaded slopes

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Persistent Slabs

No avalanches observed on this layer today, however the potential still exists with a large enough trigger.

  • If triggered the wind slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3