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Archived

Avalanche Forecast

Jan 26th, 2012–Jan 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
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Cariboos.

Confidence

Fair - Timing of incoming weather is uncertain

Weather Forecast

Friday: Cloudy with flurries. Freezing level near valley floor. Light to moderate winds.Saturday: Light to moderate snow. Freezing level rising to 700m by evening. Strong to gale westerly winds. Sunday: Moderate (locally heavy) precipitation with the freezing level climbing to 1500m by afternoon. Strong to gale westerly winds.

Avalanche Summary

A few natural avalanches, up to size 2, were observed in steep lee (wind-loaded) terrain on Wednesday. Whumphing was observed below treeline.

Snowpack Summary

Up to 80cm of snow has fallen since Monday. Strong winds have created hard slabs, soft slabs and fragile cornices. The freezing level went up to about 1000 metres early Wednesday morning. Snowpack tests give easy to moderate results on several layers in the upper snowpack. Key concerns as further snow builds this weekend include a weak facet layer that was created during the brutal cold snap in mid-January and a buried crust.

Avalanche Problems

Wind Slabs

Wind slabs continue to build behind ridges and terrain breaks. Areas that avalanched earlier this week may re-load as the storm continues.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 6

Storm Slabs

Storm slabs continue to build above buried weak layers. Warming and snowfall this weekend will increase the storm slab problem.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 6