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Archived

Avalanche Forecast

Jan 14th, 2015–Jan 15th, 2015
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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

Regions: Little Yoho.

Enjoy the nice weather, but be cautious of the persistent weak layer that is still at the prime depth for human triggering

Weather Forecast

A weak system will bring light snow starting Thurs PM. We should see 5-10 cm's by Friday night with a clearing trend for Saturday. With this system, we will also see strong alpine winds from the west. Temperatures will cool over the period but remain -5/-10 range at valley bottom.

Snowpack Summary

Snowpack observations at 2200m on Mt. Field on Monday and Emerald Lake slide path on Tues indicate the Dec 18 surface hoar layer down 45cm remains prominent with moderate test results. This layer remains prime for human triggering. Sun crust forming on steep solar aspects and new surface hoar forming in sheltered areas.

Avalanche Summary

No new avalanches observed or reported today.

Confidence

Intensity of incoming weather systems is uncertain on Thursday

Avalanche Problems

Persistent Slabs

A persistent weak layer of surface hoar/ crust/ facets lurks 50 cm's below the surface. This layer is most reactive at the treeline elevation where it is a surface hoar/ crust combination.

  • Be aware of the potential for large, deep avalanches due to the presence of buried surface hoar.
  • Choose conservative lines and watch for clues of instability.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3