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Avalanche Forecast

Archived

Dec 13th, 2019–Dec 14th, 2019

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

Regions

Kootenay Boundary.

The recent snow has added load to buried weak layers and may still be reactive to human triggers. Conservative terrain selection is recommended.

Confidence

Moderate - Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

FRIDAY NIGHT - Cloudy with clear periods / light northwest winds / alpine low temperature near -8

SATURDAY - Mainly cloudy / light northwest winds / alpine high temperature near -6 

SUNDAY - Cloudy with sunny periods / light northwest winds / alpine high temperature near -8

MONDAY - A mix of sun and cloud / northwest winds, 20-30 km/h / alpine high temperature near -8

Avalanche Summary

There were a few human and explosives triggered avalanches size 1-2 reported on Thursday. 

Check out this MIN report of an avalanche in the Big White Backcountry on Thursday.

Snowpack Summary

10- 25 cm of recent fresh snow sits on a weak layer of feathery surface hoar in many areas, and on a crust on steep south facing slopes. Recent strong winds have likely formed storm slabs that may be reactive to human triggers. There is a weak layer down approximately 50-60 cm that consists of a crust with sugary faceted snow on top of it. Recent test results indicate that this layer could react to human triggers.

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.