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Avalanche Forecast

Archived

Feb 23rd, 2019–Feb 24th, 2019

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

South Coast Inland.

Slab avalanches are possible to trigger at upper elevations. Use caution on slopes getting hit by the sun.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

SATURDAY NIGHT: Cloudy with clear periods, light southeast wind, alpine temperatures drop to -10 C.SUNDAY: Sunny with cloudy periods, light northeast wind, alpine high temperatures around -8 C.MONDAY: Mix of sun and cloud, light northeast wind, alpine high temperatures around -10 C.TUESDAY: Mostly sunny in the north and isolated flurries in the south, moderate northeast wind, alpine high temperatures around -12 C.

Avalanche Summary

Preliminary reports from Saturday are limited to small loose dry avalanches in steep terrain.On Friday, a size 1.5 wind slab was remotely triggered as a skier approached a steep south-facing slope north of Pemberton. The slab was 10-40 cm deep and had recently been loaded by north winds.On Thursday, a skier triggered slab avalanche was reported in the Duffey area on northwest aspect at 1900 m (see MIN report here).

Snowpack Summary

Friday's storm delivered 10-15 cm in northern parts of the region and 15-25 cm in southern parts of the region. Deeper deposits may be found in wind-affected alpine terrain. Recent snow may sit above hard wind slabs or sun crusts. A weak layer above a crust can be found roughly 20-30 cm deep at treeline and below treeline elevations, and has produced some small slabs with low destructive potential on isolated features. The remainder of the snowpack is generally well-settled.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.