Avalanche Forecast

Issued: Jan 28th, 2017 4:00PM

The alpine rating is high, the treeline rating is considerable, and the below treeline rating is moderate. Known problems include Wind Slabs and Loose Dry.

deryl kelly, Parks Canada

Jasper.

A weak interface has hit critical load and is proving to be very sensitive. New snow and wind overloading this interface on all aspects and elevations.

Summary

Weather Forecast

Steady, seasonally mild alpine temperatures (-5 to -10). Forecasted SW winds with strong to extreme ridge top values. Some snow expected (5 to 10cms). Very good recipe for new building slab conditions.

Snowpack Summary

Surface hoar present in most areas unaffected by moderate winds. Exposed TL and ALP have been stripped of snow. Settling and distribution of upper and mid snow pack overlies facets and basal weakness.

Avalanche Summary

Numerous reactive windslab and loose dry avalanches reported along the parkway up to sz 2.5 on all aspects. Most active at TL elevations between (2200m - 2500m).

Confidence

Wind effect is extremely variable

Problems

Wind Slabs

Big open features should be avoided. Recent natural avalanche activity on these slopes is expected to continue.

Minimize exposure to steep, planer slopesMinimize overhead exposure during periods of heavy loading from new snow, wind.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Loose Dry

Wind loading and shedding from steep faces, especially concerning for ice climbers.

Minimize overhead exposure during periods of heavy loading from new snow, wind.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely - Very Likely

Expected Size

1 - 3

Valid until: Jan 29th, 2017 4:00PM