Archived

Avalanche Forecast

Dec 23rd, 2011–Dec 24th, 2011

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

3: Considerable

The avalanche danger rating in the alpine will be considerable

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

3: Considerable

The avalanche danger rating in the alpine will be considerable

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

Regions: Banff Yoho Kootenay.

The chance of triggering a large avalanche at higher elevations is decreasing, but the consequences of triggering one is large. Its still not a good time to go into bigger terrain. A pulse of strong wind and snow Sunday may elevate the hazard. SH

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Avalanche Problems

Wind Slabs

Thin windslabs formed from previous strong winds can be triggered in steep open areas. In some cases this may provide enough load to step down to the deeper basal layers to cause larger avalanches.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

Light loads can still cause slides on the basal depth hoar/October rain crust. Trigger points are thin areas in steeper terrain, where fractures can spread to thicker areas. Deeper snow packs with even distribution will be less prone to triggering.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3