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Archived

Avalanche Forecast

Feb 8th, 2015–Feb 9th, 2015
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
4: High
The avalanche danger rating below treeline will be high
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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

Regions: Jasper.

100 cm of storm snow over the weekend is still very sensitive!  Stick to low angle terrain and away from big slopes.

Weather Forecast

Light snow beginning Monday afternoon with 10 cm possible with light SW winds.  Clearing and cooling on Tuesday and then very warm conditions into the weekend.

Snowpack Summary

Huge variation in the snowpack across the forecast region!! The Icefields Area received around 1 meter of snow since Friday while areas to the north received much less. Sensitive storm slab can be found on all aspects at treeline and above. Rain and freezing rain fell below treeline in most areas.

Avalanche Summary

The natural avalanche cycle continues with slides up to 2.5 involving the new storm snow. Avalanche control efforts along the Icefields Parkway produced large avalanches around Polar Circus.

Confidence

Timing or intensity of solar radiation is uncertain on Tuesday

Avalanche Problems

Storm Slabs

Thick storm slabs can be found on all aspects at treeline and above.
Use caution in lee areas in the alpine and treeline. Recent storm snow has formed touchy slabs.If triggered the storm slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 4

Deep Persistent Slabs

This layer remains a concern in isolated areas above treeline and may be triggered by large loads.
If triggered the storm slabs may step down to deeper layers resulting in large avalanches.Avoid steep slopes below cornices.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 4