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Archived

Avalanche Forecast

Nov 24th, 2012–Nov 25th, 2012
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
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

Regions: Kananaskis.

A surprising lack of winds throughout most of the forecast area on Saturday.  Pockets of windslabs can be found along ridge-crests and in cross-loaded feature so be cautious.  There is LOTS of early seasons hazards out there showing right now...

Confidence

Good

Weather Forecast

Temperatures will remain cool on Sunday and thankfully the winds will remain generally light.  We may see a few cm of new snow fall throughout the day but little accumulation is expected over the next 24hrs.

Avalanche Summary

A few new small loose dry avalanches on N aspects.  2 size 2.5 slab avalanches on Mt Murray initiating in steep N and NE alpine terrain running to the middle of their normal run-out's.

Snowpack Summary

Little change.  Upper snowpack continues to settle under influence of mild temperatures.  Sheers within the upper snow pack are beginning to settle and strengthen.  November Rain crust down 30-70cm depending on area (see Tent Ridge profile).  Lots of variability in snowpack depths throughout the region at this time.

Avalanche Problems

Wind Slabs

Lee and crossloaded features are places where one can expect to encounter pockets of windslabs that may be triggerable by light loads such as a skier.  Cornice collapses have been releasing slabs up to sz 2.5 on underlying slopes over the past 48hrs.
Avoid lee and cross-loaded terrain near ridge crests.>Avoid unsupported slopes.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 5

Persistent Slabs

The november rain crust persists about 15cm off the ground throughout the forecast area.  Avalanches in the upper snowpack may step down to this weakness causing a large avalanche.
Be aware of thin areas that may propagate to deeper instabilites.>Early season hazards such as rocks, trees and stumps are still visible.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 3 - 5