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Archived

Avalanche Forecast

Dec 23rd, 2014–Dec 24th, 2014
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
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
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
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

Regions: Little Yoho.

Mod to strong westerly wind with upwards of 20cm of new snow along the divide will elevate the danger rating on Wednesday.

Weather Forecast

An additional 20cm is expected tonight with moderate to strong west winds in the alpine. This will elevate the danger rating.

Snowpack Summary

10-20cm of new snow has accumulated on the divide. This new snow has blown around by moderate SW winds to create thin, soft windslabs in the ALP and at TL. These windslabs sit on a surface hoar layer in many areas and will be one to watch in the future. The basal crusts/ facets persist providing a rotten foundation for this new snow.

Avalanche Summary

No avalanche observed or reported today, however, we expect to see a small cycle within the next 24 hours.

Confidence

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

Avalanche Problems

Deep Persistent Slabs

Natural avalanche activity has subsided but snowpack tests show that the weak facets at the basal level continue to be the big issue. The slab that rests on this weak structure may indicate some strength in places but in fact very little has changed.

  • Be aware of thin areas that may propogate to deeper instabilites.
  • Be aware of the potential for full depth avalanches due to deeply buried weak layers.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Wind Slabs

Strong west wind on Monday night at ridge top has created windslabs in lee areas. These windslabs are between 20 and 40cm thick and easily triggered by skiers/riders.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2