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Archived

Avalanche Forecast

Dec 3rd, 2015–Dec 4th, 2015
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

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

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

Avalanche 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