Archived

Avalanche Forecast

Mar 16th, 2012–Mar 17th, 2012

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

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

2: Moderate

The avalanche danger rating below treeline will be moderate

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

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Banff Yoho Kootenay.

We will see some flurries through the weekend with easing winds and freezing levels to 1700m. Conditions are slowly improving as bridging strength increases, but consequences will be high if you trigger a slide on the Valentines surface hoar. SH

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Freezing levels are uncertain on Saturday

Avalanche Problems

Storm Slabs

10-30cm of storm snow has created slabs 20-40cm thick. These will be susceptible to human triggering in the short term, especially in steeper terrain. Warm temperatures have promoted settlement and bonding of these slabs to the surfaces below.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

The Valentines surface hoar layer has been less active over the last few days. The lack of activity may give some false security, but as it is now buried 70-100cm deep, any slope which gets triggered will produce large avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 3