Avalanche Forecast

Issued: Dec 1st, 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.

william lawson, Parks Canada

Jasper.

Moderate danger rating represents a heightened avalanche danger where human triggered avalanches are possible. This is not the green light to go anywhere.

Summary

Weather Forecast

Westerly flow continues to pull moist air from the coast bringing small amount of precipe to the Rockies. Expect periods of snow with accumulated amounts of10cm this weekend. Winds will remain light to moderate out of SW ,and temperatures steady at -8. Sunday winds will shift bringing a cold air mass from the north with low temps of -15.

Snowpack Summary

Wind slabs continue to build 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

No new avalanches observed or reported

Confidence

Problems

Wind Slabs

wind slabs continue building at ridge tops and if triggered, has the potential to step down to the deeper instability.

Avoid exposure to overhead avalanche terrain during periods of moderate to intense transport.Avoid freshly wind loaded features.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Dec 2nd, 2017 4:00PM