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Archived

Avalanche Forecast

Dec 14th, 2015–Dec 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
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Assess the snowpack before committing to larger slopes,  the Dec 2 interface could still be reactive to skier triggering and could result in a large avalanche.

Weather Forecast

A ridge of high pressure will build over southern B.C today supporting cool and (relatively) wind-less conditions in the mountains. Mainly cloudy with isolated flurries (less than 1cm), with freezing levels to remain at valley bottom.

Snowpack Summary

30cm of recent storm snow now covers a supportive crust below 1600m. 60-80cm of settled snow now lies over the Dec 2 interface. Below treeline the Dec 2 surface hoar has showed no recent activity. On steep solar aspects above treeline Dec 2 is a sun crust and and remains reactive in stability tests in the mod - hard range.

Avalanche Summary

Avalanche activity has tapered off since Friday. The only recent activity that has been observed is out of regular performers in steep, 'unskiable', wind loaded gullies.

Confidence

Avalanche Problems

Persistent Slabs

80-100cm of  settling snow sits on top of the Dec 2 persistent weak layer, which is surface hoar at and below treeline and suncrust on solar aspects treeline to alpine. The layer is producing moderate-hard results on field tests yesterday at 2000m.
Avoid open slopes and convex rolls at and below treeline where buried surface hoar may be preserved.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 3