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Archived

Avalanche Forecast

Feb 4th, 2015–Feb 5th, 2015
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Jasper.

High snowfall with strong winds and warm temperatures are expected on Friday.

Weather Forecast

Snow is forecasted for the region beginning on Thursday. The intensity of snow will increase on Friday and then taper off Saturday.  Up to 40cm is expected. Along with the snow, temperatures will rise and winds will increase, from the southwest.

Snowpack Summary

Surface hoar developed overnight. 5-20cm of new snow sits on the rain crust that formed last week.  The rain crust can be found on all aspects up to 2100m. Wind slabs can be found on lee aspects and cross loaded features in the alpine.

Avalanche Summary

No new avalanches observed along the Icefields Parkway today.  Good visibility.

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

Windslabs have developed on lee and cross loaded features at alpine elevations.
Avoid steep lee and cross-loaded features

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

This layer remains a concern in isolated areas above treeline and may be triggered by large loads such as cornices, surface slides or from shallow areas by skiers. The entire snowpack throughout the forecast region is sitting on 20cm of depth hoar.
Be aware of thin areas that may propogate to deeper instabilites.Caution around convexities or areas with a thin or variable snowpack.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3