Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Feb 17th, 2013–Feb 18th, 2013
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
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: Kananaskis.

A welcome addition of up to 25cm's of new snow AND light winds with it. Lots of sluffing today on anything over 40 degrees. Caution with terrain traps at all elevations. Clear skies tomorrow may be a trigger for even more loose dry avalanches.

Confidence

Good

Weather Forecast

We are on the tail end of the system that has brought us up to 25cm. The snow came with very little wind. Forecasted wind speeds are expected to remain light to moderate for Monday. Monday will start clear with increasing cloud throughout the day. No more precip until Tuesday. Temps will remain steady at -12 in the alpine.

Avalanche Summary

Numerous loose dry out of steep alpine terrain, all aspects. Isolated SSL out of steep unsupported  alpine terrain, up to SZ 2.

Snowpack Summary

10-20cm in the last 24hrs. Low density with little cohesion.  CTM (SP), down 25 on old windslab. E asp. The new snow is hiding a variety of old surfaces. The slabs that sit below the storm snow are variable in thickness and hardness.

Avalanche Problems

Loose Dry

Lots of activity within the storm snow. Widespread sluffing with the occasional slab pulling out in steep unsupported slopes. Sizes were mostly 1-1.5.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 3

Wind Slabs

Wind slabs are present in lee and cross loaded features in the alpine and open areas at treeline. These slabs are 30 to 70cm thick and are reactive to skier traffic. Spatial variability is a key point with these slabs.
Avoid lee and cross-loaded terrain near ridge crests.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 5