Avalanche forecast

Kootenay Boundary

Dec 9, 2016Avalanche Canada
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Archived · expired 10 years ago

Avalanche danger

Fri
Sat
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Watch for blowing snow at ridgetops to see where wind slabs are developing.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2
    Increasing wind speeds and light flurries will continue to develop wind slabs at higher elevations. Wind slabs are possible on any aspect, as winds have shifted from the south to the north.

Confidence

Moderate - Wind effect is extremely variable

Weather Forecast

FRIDAY: Isolated flurries, 20-40 km/h southwest winds, alpine temperatures at -15.SATURDAY: Light flurries with up to 5 cm accumulations, 20-40 km/h southwest winds, alpine temperatures at -12.SUNDAY: Isolated flurries, 20-40 km/h west winds, alpine temperatures at -12.

Avalanche Summary

Small loose dry avalanches continue to be reported in steep terrain, but no slab avalanches have been reported since Tuesday.

Snowpack Summary

Northerly winds continue to redistributed loose snow, forming stubborn wind slabs in exposed alpine areas. New surface hoar up to 15 mm in size has been reported growing on the surface, and will continue to develop during this fair weather period. The top 25 cm of snow remains low density thanks to cold temperatures, and sits above a thin rain crust in parts of the region. The lower snowpack has been reported to be well settled. A widespread crust that was buried in November can be found 40-80 cm deep. Cold temperatures have promoted facet growth around the crust, which could make the layer reactive in shallow start zones. Snowpack depths are 130-160 cm at treeline elevations.

Regions covered