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Archived

Avalanche Forecast

Nov 13th, 2012–Nov 14th, 2012
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Banff Yoho Kootenay.

Weather Forecast

Mixed sun and cloud for tomorrow with freezing levels around 1300 meters.. No snow forecasted through the end of the week.

Snowpack Summary

25 to 35 cm of last weeks storm snow overtop of Nov. 6 rain crust. This crust is well developed up to 2500 m and disappears around 2700m. Pit at Bow Summit showed mod. shears within crust with compression test. Various hard and soft slabs found in alpine

Avalanche Summary

No new naturals avalanches observed today. 

Confidence

Avalanche Problems

Wind Slabs

Various hard and soft wind slabs (20-50cm thick) in the alpine are sitting on the Nov.6 crust and producing moderate shears with compression test. Slabs becoming less reactive but still possible for a skier to trigger these slabs in steep lee terrain
Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Persistent Slabs

In helicopter flight over the Wapta on Sunday several deep slabs size 2-3 were been noted on isolated steep alpine slopes . Failure plane was at the bottom of the snow pack on firn or glacier ice. 
Be aware of the potential for full depth avalanches due to deeply buried weak layers.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3