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Archived

Avalanche Forecast

Nov 22nd, 2018–Nov 23rd, 2018
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

Not enough snow coverage for skiing at lower elevations in Little Yoho, so this bulletin is mostly based on observations from the Banff, Yoho & Kootenay region. Ice climbing in Field is just starting to happen...

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

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

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

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2