Avalanche Forecast

Issued: Mar 19th, 2012 7:40PM

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

Landon Shepherd, Parks Canada

Jasper.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Wind effect is extremely variable

Problems

Persistent Slabs

Natural activity is reduced; however, slopes that did not slide during March 6th avalanche cycle should be treated with caution. The buried surface hoar layer remains a concern. Solar effect is a likely trigger in the afternoon.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 4

Storm Slabs

Variable direction moderate alpine winds continue to form slabs on lee aspects. 15cm last night makes for 70cm since march 12th. Triggering the slab has the potential to step down to the buried surface hoar layer 80-120cm down.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Loose Wet

Surface snow is responding to the strong solar radiation effect that this time of year brings to steep south and west facing slopes. Ice climbers should avoid exposure to overhead hazard during warm, sunny afternoon periods.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Likely

Expected Size

1 - 3

Valid until: Mar 20th, 2012 4:00PM