Archived

Avalanche Forecast

Nov 21st, 2011–Nov 22nd, 2011

Alpine

4: High

The avalanche danger rating in the alpine will be high

Treeline

4: High

The avalanche danger rating at treeline will be high

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Alpine

4: High

The avalanche danger rating in the alpine will be high

Treeline

4: High

The avalanche danger rating at treeline will be high

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

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Regions: Jasper.

The avalanche danger has increased to HIGH with up to 35 cm of snow expected in the next 24 hours.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

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

Avalanche Problems

Storm Slabs

A warm wet weather system will arrive Monday night with strong south to southwest winds and up to 35 cm of snow forecast in the Icefield Area (lesser amounts are expected further north in the forecast area)

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

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 2 - 4

Persistent Slabs

Warm temperatures and heavy snow may increase the possibility of natural avalanches on the weak basal facets below these slabs.

Aspects: North, North East.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Wind Slabs

SW winds continued to build slab thickness. Natural activity is expected especially on steeper terrain.These slab may have developed further down slope from ridgelines.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3