Avalanche Forecast

Issued: Nov 28th, 2018 4:00PM

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

timothy johnson, Parks Canada

Jasper.

Test slopes before committing to features.

Summary

Weather Forecast

Light west winds persist through Thursday with alpine day time high temperatures around -7 and a mix of sun and cloud. Click here for the Avalanche Canada mountain weather forecast.

Snowpack Summary

Strong SW wind and warm temps have likely created windslabs in the alpine. The October 25 crust, sitting 0-40cm off the ground, remains a concern. This crust is most prevalent in deeper snowpack areas - found predominately on N-NE lee features. Faceting above and below this layer continues to weaken the lower snowpack.

Avalanche Summary

No recent activity has been reported.

Confidence

Due to the number of field observations

Problems

Wind Slabs

Strong winds have likely created windslabs .

If triggered the wind slabs may step down to deeper layers resulting in large avalanches.Test slopes before committing to them.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

Most skiable slopes have this crust, assess the strength of this interface before jumping into any committing lines. See forecast details for more info on this layer.

Watch for whumpfing, hollow sounds, and shooting cracks.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1.5 - 2.5

Valid until: Nov 29th, 2018 4:00PM