Archived

Avalanche Forecast

Feb 26th, 2012–Feb 27th, 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

3: Considerable

The avalanche danger rating below treeline will be considerable

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

3: Considerable

The avalanche danger rating below treeline will be considerable

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

Regions: Banff Yoho Kootenay.

Tricky conditions exist. Sporadic natural activity to size 2.5 on the Valentines surface hoar layer today, and lots of smaller skier triggered slides, mainly at treeline. This condition will exist for the foreseeable future, so pull in the reigns. SH

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number and quality of field observations on Sunday

Avalanche Problems

Persistent Slabs

35-55cm at treeline of settled snow sit atop the widespread Valentines surface hoar, and sun crusts on steep S. aspects. Easy to Mod shears were found in Yoho at treeline , with settlements and remote triggering of small rolls in gladed terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 3

Wind Slabs

Touchy, thin surface wind slabs in lee terrain of ridgetops have been observed, and in some cases may trigger the deeper surface hoar weakness. Light winds and clearer skies Monday will not add to these problems.

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

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2