Avalanche Forecast

Issued: Dec 27th, 2014 4:00PM

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

deryl kelly, Parks Canada

Jasper.

Typical Rockies snowpack with better than typical travel and good turns in north and east TL aspects.

Summary

Weather Forecast

Cold with only a light teasing of new snow expected to fall in the southern forecast area.

Snowpack Summary

Consistent winds, just at transport speeds are forming minor new wind slabs by reverse loading S-SE aspects and are most visible in cross-loaded gully features in the southern forecast area. Shallow low density upper snowpack over a strong mid-pack sitting on a weaker facet base. Typical Rockies snowpack we've learned to love! Enjoy!

Avalanche Summary

No new avalanche activity reported in forecast area

Confidence

Problems

Wind Slabs

Northerly winds reverse loading cross-loaded gulley features. Previous wind slab from SW winds appear to be well bonded to snow below.

Avoid travelling in areas that have been reverse loaded by winds.Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Deep Persistent Slabs

This weak layer exists below a strong mid-pack at treeline and sub-alpine elevations. Large loads such as surface slides or cornice collapse could trigger this deep persistent weakness.

Carefully evaluate and use caution around thin snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Dec 28th, 2014 4:00PM