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Archived

Avalanche Forecast

Dec 5th, 2015–Dec 6th, 2015
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
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

Regions: Banff Yoho Kootenay.

More snow and more wind will thicken up the new slabs in the alpine. Surface hoar near treeline will begin to get more reactive. JP

Weather Forecast

The winds are picking up as the chinook flow re-establishes itself over the forecast area. A series of disturbances is forecast to begin Sunday afternoon with 10-15 cm of snow. There will be more precipitation in the northern and western portions of the forecast area. Temperatures are expected to remain cool

Snowpack Summary

Surface hoar, sun crust and facets now buried by 5-20cm in the alpine. Surface hoar to 20mm has been found up to 1800m. South and Southwest winds are back in the moderate range. Opens areas near or above treeline are a mix of hard or very hard windslabs and facets. Poorly bonded windslabs can be expected at ridge-crests and in lee areas.

Avalanche Summary

Only small avalanches from from alpine terrain were reported today.

Confidence

Avalanche Problems

Wind Slabs

Small wind slabs will be forming in immediate lees. Places like the Bow Summit/Wapta region may have thicker wind slabs as they received more snow than other areas of the forecast region.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2