Avalanche Forecast

Issued: Mar 28th, 2012 5:20PM

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

garth lemke, Parks Canada

Jasper.

Up to 10cm may arrive tonight into Thursday not enough to change the current danger rating. However, if the sun pokes out, destabilization can occur quickly especially on solar aspects.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing or intensity of solar radiation is uncertain

Problems

Loose Wet

Cloud cover today reduced daytime heating but anytime the sun pokes out, loose wet avalanche activity will increase. Expect this activity originating from steep S or W aspect rock bluffs or gullies starting mid afternoon.

Aspects: North, North East, East.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

1 - 3

Persistent Slabs

The buried surface hoar layer 70-120cm down remains a concern in areas that have not avalanched. Whumphing is still being observed on isolated North shaded glades below treeline. Be cautious of this layer as triggering it would be high consequence.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 4

Wind Slabs

Steady moderate Southwest winds continue to build windslabs and cornices on Northerly aspects. Natural activity is reduced with this problem but be vigilant with as shallow spots or large cornice failures being possible triggers.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Mar 29th, 2012 4:00PM