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Archived

Avalanche Forecast

Dec 22nd, 2019–Dec 23rd, 2019
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Jasper.

Highway 93N and Maligne Road will remain closed overnight Sunday, into Monday due to significant avalanche debris across the highway. Check Alberta 511 for updated road opening details.

Weather Forecast

Last of the recent storm passing through the region; followed closely behind by light SW winds, lower RH levels and broken skies. Seasonal cool temps headed into Christmas with daytime highs to -8, lows -15.

Snowpack Summary

New snow fallen in the last 48 hours with very little wind effect and variable slab cohesion. This overlies wind slab and a variety of weak layers near the ground.

Avalanche Summary

Widespread avalanche activity on all aspects and elevations up to size 3.0. Many dry loose avalanches below treeline and above, numerous storm slab avalanches below treeline and above.

Avalanche Control on the Icefields parkway produced numerous slides upto size 3.

Confidence

Avalanche Problems

Storm Slabs

Expect many soft slab avalanches on all aspects and elevations up to size 3 Sunday

  • If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 3

Loose Dry

Steep features

  • If triggered dry loose point releases can form deeper deposits in terrain traps.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2

Deep Persistent Slabs

Dry loose and storm slab avalanches may step down to weak layers close to the ground producing large avalanches

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

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 3