Avalanche Forecast

Issued: Dec 3rd, 2017 4:00PM

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

A.L. Horton, Parks Canada

Jasper.

Sheltered tree line slopes will offer excellent skiing.

Summary

Weather Forecast

Stagnant weather system into the beginning of the week with cool temperatures, clearing skies, light winds and no precipitation.Â Could this be the beginning of the cursed drought???

Snowpack Summary

Wind slabs in exposed lee features. A significant crust (black friday, Nov.23) can be found down 30 to 70cms. A persistent slab overlays this crust and so far the bond appears to be strengthening at this interface. The Halloween crust sits well down in the snowpack at TL locations and as high as 2700m.

Avalanche Summary

Several old (+48hrs) slab avalanches to size 2.5 in steep alpine terrain on North aspect observed around the Churchill Range.

Confidence

Due to the number of field observations on Tuesday

Problems

Wind Slabs

Wind slabs are present on lee aspects. Bond strength of these slabs to the snowpack below is uncertain.

Use caution in lee areas. Recent wind loading has created wind slabs.If triggered the wind slabs may step down to deeper layers resulting in large avalanches.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Dec 4th, 2017 4:00PM