Avalanche Forecast

Issued: Mar 27th, 2012 4:00PM

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

garth lemke, Parks Canada

Jasper.

5-10cm is expected Tuesday night into Wednesday with seasonally warm temperatures. This will likely improve overall ski quality. Natural activity is reduced but stay vigilant especially on large committing terrain features.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Problems

Persistent Slabs

The buried surface hoar layer 50-120cm down remains a concern in areas that have not avalanched. Whumphing is still being observed on 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 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

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

Valid until: Mar 28th, 2012 4:00PM