Avalanche Forecast

Issued: Dec 3rd, 2015 8:02AM

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

chris gooliaff, Parks Canada

Glacier.

Danger will increase rapidly if we receive more snow and wind than forecasted.

Summary

Weather Forecast

The big picture shows a series of storms tracking across BC over the next few days. Up to 25cm of snow may fall today with strong SW winds. Freezing levels will rise, but to what elevation (1600m?) is uncertain. A slight lull Friday, then another pulse Saturday bringing a further 20-25cm of snow with warm temp's and strong SW winds.

Snowpack Summary

The new storm snow today will be covering up a variety of old surfaces. The biggest concern is the large surface hoar (20mm at and below tree-line, 6mm up to ridge-lines) and facets that it will be sitting on... a very unstable layer as the new foundation. Sun crusts with surface hoar were prevalent on steeper SE through SW aspects.

Avalanche Summary

No new avalanches observed yesterday.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Problems

Storm Slabs

If we get significant amounts of snow today, along with winds, the new slabs will be particularly touchy, given that they will be sitting on a house of cards (surface hoar and crusts).

Watch for whumpfing, hollow sounds, and shooting cracks.Be cautious as you transition into wind affected terrain.

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

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

1 - 3

Valid until: Dec 4th, 2015 8:00AM