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Archived

Avalanche Forecast

Dec 3rd, 2012–Dec 4th, 2012
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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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.

Weather Forecast

The forecast calls for some significant snowfall in the Icefields area accompanied by moderate Southwest winds. This will start sometime in the early morning and is expected to continue for the following 24 hours. Wednesday is expected to continue with overcast skies and light snowfalls with a possible clearing trend by Thursday.

Snowpack Summary

Hard test results were found in the alpine underneath a windslab and both above and below the midpack crust in the Bald hills area near Maligne lake. Treeline has experienced some moderate wind transport although previous windslabs have bonded well.

Avalanche Summary

A size 3 slab was observed in the hilda creek area. It originated from sloughing in a gully feature and expanded into a slab on a large open slope at 2400m that is the runout for the gully.� The slab likely propogated on the November 01 raincrust.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Avalanche Problems

Wind Slabs

A size 2 avalanche was observed on the Parker ridge slidepaths. Pay particular attention to steep unsupported wind loaded slopes in the alpine.
Avoid lee and cross-loaded terrain near ridge crests.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3

Persistent Slabs

A persistent facetted weakness can be found around a mid-pack crust.� An isolated size 3 avalanche on a steep Northerly large open slope in the Hilda Creek area likely ran on this layer.
Avoid freshly wind loaded features.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3