Archived

Avalanche Forecast

Mar 29th, 2012–Mar 30th, 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

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

Regions: Little Yoho.

There may be 20cm of new snow when you wake up tomorrow. Likely this will be blown into wind slabs in the alpine and tree-line. Be cautious along ridge lines, and remember that you could remote trigger an avalanche from thin, weak spots in the slope.

Avalanche Problems

Persistent Slabs

Test pits today at tree-line and alpine elevations, east of the divide, found the surface hoar down 60-75cm, and failing sudden planar in the moderate to hard range. Given the widespread nature of this layer, supported slopes are still my choice.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Wind Slabs

We may see up to 20cm of snow tonight and early tomorrow morning, accompanied by moderate to strong west winds. This will create a wind slab that will take some time to bond to the existing snowpack. Caution on lee features and cross-loaded gullies.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2