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

Avalanche Forecast

Dec 5th, 2012–Dec 6th, 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
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: Jasper.

Periodic road closures may be in affect on Thursday for avalanche control in the Icefields area with delays of up to 2 hours. Check the AMA road report after 0900 hours to confirm if control actions are taking place.

Weather Forecast

Winds and snow are tapering off overnight. Temperatures are expected to get cooler.  A clearing trend is expected to arrive in time for the weekend.

Snowpack Summary

Twenty cms of new snow overnight. Moderate Southwest winds at ridgetop this afternoon are redistributing recent storm snow to lee aspects. This may provide the load to cause natural avalanches on the midpack facet layers around the November 01 crust.

Avalanche Summary

No New avalanche observations due to obscured visibility. 

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Gusting Southwest winds are moving 20cm of  storm snow onto Northeast aspect ridgetops and lee terrain features. Triggering a windslab may provide the energy for an avalanche to step down to the persistent weakness described below.
Avoid lee and cross-loaded terrain near ridge crests.Be careful with wind loaded pockets while approaching and climbing ice routes.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Persistent Slabs

A persistent facetted weakness can be found around a mid-pack crust. Saturday, an isolated size 3 slab avalanche on a steep Northerly slope in the Hilda Creek area likely ran on this layer. No other avalanches have been observed on this layer.
Avoid freshly wind loaded features.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3