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Archived

Avalanche Forecast

Dec 27th, 2019–Dec 28th, 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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Jasper.

Constant SW moderate winds have created windslabs that are ripe for human triggering.

Weather Forecast

The weekend will bring cloudy and sunny periods and a slight warming trend. Day time highs of -5 on sunday. No precipitation expected over the weekend, The winds will continue into Saturday in the moderate westerly range tapering off for Sunday.

CAA's Mountain Weather Forecast for more specific details

Snowpack Summary

6-20mm Surface Hoar growing up to 2200m. Consistent Moderate SW winds for the past 36 hours have created wind slabs in lee features. This overlies a mosaic of buried wind slabs and facetted weak layers. Basal layers continue to develop into larger facets and depth hoar.

Avalanche Summary

Several wind slabs to Size 2 noted in immediate Lee features Treeline and above.

Confidence

Avalanche Problems

Wind Slabs

The first bit of wind after the storm on Dec 21, fresh wind slabs were noted building today

  • Be careful with wind loaded pockets while approaching and climbing ice routes.
  • Use caution in lee areas. Recent wind loading have created wind slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5

Loose Dry

Caution Ice climbers in confined features with steep walls holding dry loose snow

  • Use caution above ledges and cliffs where small avalanches may have severe consequences.
  • If triggered dry loose point releases can form deeper deposits in terrain traps.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5