Archived

Avalanche Forecast

Apr 4th, 2012–Apr 5th, 2012

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

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

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 winter that keeps giving. 20cm of new snow by tomorrow. There has been just enough spring-like weather to create crusts on solar aspects, but not enough to create the usual bomber spring snow pack. Travel as though it is still winter!

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Wind Slabs

New wind slabs are forming in the alpine and at tree-line, on top of the storm snow slabs formed the last few days. These slabs can be easily triggered and may result in an avalanche stepping down to deeper weaknesses.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

The Valentines surface hoar layer and the weak basal depth hoar have both been sliding layers for large avalanches over the last several days. Steep unsupported slopes, thin rocky areas and steep solar aspects are the most likely areas to trigger.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 4