Avalanche Forecast

Issued: Dec 4th, 2016 3:50PM

The alpine rating is below threshold, the treeline rating is below threshold, and the below treeline rating is below threshold. Known problems include Wind Slabs.

Avalanche Canada swerner, Avalanche Canada

Assess local conditions carefully and use extra caution on wind affected slopes. Due to the lack of snowpack and avalanche data, we are currently unable to issue danger ratings for this region.

Summary

Confidence

-

Weather Forecast

A cool arctic air mass will dominate the weather pattern over the next few days bringing cooler and much dryer conditions. Coastal areas may see some flurries and cloudy skies tonight and early tomorrow before the arctic front locks in on Tuesday. Skies will mostly be a mix of sun and cloud. Alpine temperatures will drop to -20 accompanied by light NE winds.

Avalanche Summary

No new avalanches have been reported in the past few days, but observations are currently very limited in this region. Watch for the development of wind slabs on all aspects as the current winds are switching from the SW and blowing from the NW. Slopes and terrain features could become reverse loaded and catch you by surprise. Cracking, whumphing and natural avalanche activity areĀ  indicators of unstable snow.

Snowpack Summary

New snow combined with strong winds from the southwest have likely formed touchy wind slabs on lee features. Forecast switching winds from the northeast may reverse load slopes and catch you by surprise. A layer of surface hoar was reported around Hudson Bay Mountain last week, which now sits beneath 40-50 cm of settling snow. A thick rain crust that formed in early November is now buried 50-60 cm deep, and recent snowpack tests produced sudden results on facets (sugary snow) above this crust. Early season snowpack observations are still very limited in the region, but reports suggest the average snowpack depth is 50-90 cm at treeline and 120 cm or greater in the alpine.

Problems

Wind Slabs

An icon showing Wind Slabs
New wind slabs may exist in the alpine and on exposed features at treeline. Wind slabs may be touchy in areas with buried surface hoar.
Tread cautiously on open slopes and convex rolls where buried surface hoar may be preserved.Watch your transition into wind affected terrain. Some areas may have been reverse loaded by winds.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Dec 5th, 2016 2:00PM