Avalanche Forecast

Issued: Apr 4th, 2012 4:00PM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is moderate. Known problems include Wind Slabs and Deep Persistent Slabs.

garth lemke, Parks Canada

Jasper.

Storm warning, North winds, 15cm or more locally for Icefields area starting Wednesday night. May overload problems on specific slopes. Sunday's size 3 triggered by skiers shows Valentines surface hoar still a problem so stay vigilant.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Thursday

Problems

Wind Slabs

Moderate winds continue to build slabs on lee slopes. No avalanches noted on this layer but bonds have not been tested. Another 15cm or more may arrive tonight with Northerly winds further adding to this layer. Watch for reverse loading patterns.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 3

Deep Persistent Slabs

There have been several reports of large avalanches especially to the south of us. Skiers at the Icefields triggered a size 3 on this layer last Sunday. Triggering is more likely from shallow areas on the slope. Keep this layer on your radar.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 4

Valid until: Apr 5th, 2012 4:00PM