Archived

Avalanche Forecast

Dec 13th, 2011–Dec 14th, 2011

Alpine

2: Moderate

The avalanche danger rating in the alpine will be moderate

Treeline

1: Low

The avalanche danger rating at treeline will be low

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

1: Low

The avalanche danger rating at treeline will be low

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

1: Low

The avalanche danger rating at treeline will be low

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Regions: Glacier.

Large areas of Glacier National Park are CLOSED for avalanche control using EXPLOSIVES. Daily or annual winter permits are required to access winter restricted areas. Access information is available at the Rogers Pass Discovery Centre.

Avalanche Problems

Loose Dry

Expect fast sluffing in steep terrain at and below treeline with approximately 5cm of new snow on large surface hoar crystals.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Deep Persistent Slabs

Glide cracks are showing up throughout the area at all elevations. These have potential to produce large slab avalanches and are unpredictable. A basal crust observed above 2500m at Ross Peak may be triggered from shallow areas.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely

Expected Size: 2 - 4

Wind Slabs

Isolated wind slabs exist in the immediate leeward areas on ridge crests but are stubborn to trigger.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2