Avalanche Forecast

Issued: Apr 3rd, 2012 7:40PM

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

garth lemke, Parks Canada

Jasper.

A snowfall warning has been issued for Saskatchewan crossing and South starting late Tuesday night with precipitation into Thursday. An intense spring storm from NW U.S. may produce 10-25cm which may start out as rain before turning to snow.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Wednesday

Problems

Wind Slabs

Moderate to strong variable direction winds continue to build slabs on lee slopes. No avalanches have been noted on this layer but bonds have not been tested. Another 10-25cm may arrive Wednesday into Thursday adding to this layer.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

2 - 3

Deep Persistent Slabs

This layer appears to be waking up as the snowpack absorbs heat. There have been numerous reports of large avalanches especially to the south of us. Triggering is more likely from shallow areas on the slope. Easy time to be caught off guard.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 4

Loose Wet

The snowpack will remain warm overnight with the possibility of rain on Wednesday eventually turning to snow. Expect avalanche activity at lower elevations.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

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