Avalanche Forecast

Issued: Dec 4th, 2015 4:00PM

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

deryl kelly, Parks Canada

Jasper.

Careful consideration of your ski line or ice climb approaches is required where surface hoar may be present, especially in sheltered areas at TL and below.

Summary

Weather Forecast

Continued snow expected through the weekend with up to 30 cm accumulated by Sunday night. Mod to strong SW winds with warm valley bottom temps cooling with elevation.

Snowpack Summary

10cm new (and more on the way) over a well settled snowpack at treeline and below. In the alpine and TL, strong SW winds will redistribute the new snow on the lee aspects. The distribution of the surface hoar that formed during last week's inversion is widespread but is most likely best preserved on sheltered north aspect slopes.

Avalanche Summary

No new activity reported

Confidence

Forecast snowfall amounts are uncertain

Problems

Storm Slabs

Up to 20 cm of snow expected through the weekend with mod SW winds will build storm slabs on top of a well developed surface hoar layer. Sheltered northerly aspects are likely areas where this surface hoar is most prevalent.

Use caution in lee areas in the alpine and treeline. Recent storm snow has formed touchy slabs.Avoid open slopes and convex rolls at and below treeline where buried surface hoar may be preserved.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely - Very Likely

Expected Size

1 - 2

Valid until: Dec 5th, 2015 4:00PM