Avalanche Forecast

Issued: Nov 22nd, 2018 4:00PM

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

snow safety, Parks Canada

Banff Yoho Kootenay.

We are still being surprised by pockets of instability on some features. Take a moment to assess local features before jumping in.

Summary

Weather Forecast

A little snow, a little cold weather. Most of the flow is expected to the south of us.

Snowpack Summary

A mix of rain crusts and facets on the bottom overlain by new snow and slab. Lots of wind above treeline.

Avalanche Summary

No new avalanches reported

Confidence

Problems

Deep Persistent Slabs

We were seeing occasional skiier triggered , and explosive controlled avalanches on the Oct 26 crust at local ski areas. This problem seems to be most reactive in areas where the wind has created more of a slab on top of it.

If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.Whumpfing is direct evidence of a buried instability.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Wind Slabs

The wind slab problem seems to be most active in Eastern areas where there was more wind effect during the Nov. 18th. wind event.

Be careful with wind loaded pockets, especially near ridge crests and roll-overs.If triggered the wind slabs may step down to deeper facet layers resulting in larger avalanches.

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

Elevations: Alpine.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Valid until: Nov 23rd, 2018 4:00PM