Avalanche Forecast

Issued: Nov 24th, 2018 4:17PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Storm Slabs.

dsaly, Avalanche Canada

South Columbia.

This forecast is based on limited field observations. Careful terrain selection is recommended while gathering more snowpack information.

Summary

Confidence

Low - Due to the number of field observations

Weather Forecast

SATURDAY NIGHT: Mostly cloudy, no precipitation / Light and variable windSUNDAY: Partly cloudy, sunny breaks / Light and variable wind / Freezing level rising 1000-1400mMONDAY: Periods of snow, accumulating 5-20 cm / Light to moderate south-southwest wind / Freezing level rising 1200-1500 mTUESDAY: Wet flurries / Light to moderate south-southwest wind / Freezing level 1600 m

Avalanche Summary

No recent natural avalanches have been reported. Explosives have triggered small slab avalanches in ridge top lee features. We currently have limited observations in this region. Please submit your observations to the Mountain Information Network (MIN).

Snowpack Summary

A surface hoar/sun crust layer is buried under 15-30 cm recent snow. The surface hoar is more prevalent in sheltered areas and at treeline and below; the crust is found in exposed alpine terrain and solar aspects. The snowpack is supported by an unreactive basal crust/facet layer 15-25 cm above the ground. The total snowpack depth varies from 110-160 cm in the alpine, with snowpack depth decreasing quickly with decreasing elevation. In many areas, the below treeline snowpack is below threshold.

Problems

Storm Slabs

Slabs may be more reactive in wind-exposed terrain and areas where the new snow has a weak bond with the underlying surface layer.

Use caution on open slopes and convex rolls at treeline where buried surface hoar may be preserved.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Valid until: Nov 25th, 2018 2:00PM