Avalanche Forecast

Issued: Feb 23rd, 2012 4:00PM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is moderate. Known problems include Wind Slabs and Deep Persistent Slabs.

rupert wedgwood, Parks Canada

Jasper.

Avalanche control at Parker Ridge on Friday morning. Short road closures will be in effect.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Friday

Problems

Wind Slabs

Soft slabs 10-50cm overlay a buried surface hoar layer. This layer is very touchy where the wind loading is greatest . Two skiers were caught in size 1-1.5 soft slab avalanches in the past 3 days. An ice climber had a close call with a cornice fall.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

Increase loads with wind or new snow may awaken this instability. Size 2 surface slab avalanches may step down to this layer producing much larger avalanches.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Unlikely

Expected Size

2 - 4

Valid until: Feb 24th, 2012 4:00PM