Avalanche Forecast

Issued: Mar 4th, 2012 4:00PM

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

a.l. horton, Parks Canada

Jasper.

Up to 40 cm of snow is possible from Sunday night to Monday afternoon. We are expecting a significant avalanche cycle on Monday.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

on Monday

Problems

Storm Slabs

Heavy snow expected on Monday. Moderate to strong SW winds will be building wind slabs that will be sitting on top of a weak buried surface hoar layer in some locations. Past variable winds make locating this surface hoar layer challenging.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely - Very Likely

Expected Size

1 - 3

Persistent Slabs

Open slopes on Northeast to South aspects have slabs that are sitting on surface hoar 20-60cm down. On southerly aspects, the surface hoar formed on a sun crust, increasing the possibility of remote triggering and wide propagations.

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

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 4

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