Avalanche Forecast

Issued: Mar 11th, 2012 5:00PM

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

garth lemke, Parks Canada

Jasper.

Shooting cracks were observed on low angle terrain BTL to TL up to 2100m failing on FC/SH weakness. This layer will persist for sometime and its exact distribution is uncertain. "Considerable" is when most accidents happen so use extra vigilance.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

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

Problems

Persistent Slabs

Natural avalanche activity has declined but the buried SH/FC layer anywhere from 50-80cm down remains touchy. Cracking and whumphing still occurring BTL to TL. Slopes that did not slide with last Monday's 50cm storm should be highly suspect.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

2 - 4

Storm Slabs

Snow pulses have deposited 35cm in last 3 days. Another 10-15 cm is expected into Monday. The snow will cumulate into a storm slab adding load to the SH layer. Initiating a small slide has the potential to step down to this weakness.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

1 - 3

Valid until: Mar 12th, 2012 5:00PM