Avalanche Forecast

Issued: Apr 8th, 2019 5:20PM

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

ldreier, Avalanche Canada

South Columbia.

Wind slabs are likely to be encountered at upper elevations and may be reactive to human triggering, especially in lee features along ridgetops.

Summary

Confidence

High -

Weather Forecast

MONDAY NIGHT - Mainly cloudy with flurries / up to 5 cm accumulation / light southerly wind / freezing level 1300 mTUESDAY - Cloudy with flurries / light to moderate northwest wind / alpine high temperature -2 C / freezing level 1800 mWEDNESDAY - Cloudy with sunny periods / light southwest wind / alpine high temperature -4 C / freezing level 1900 mTHURSDAY - Cloudy / snow accumulation of 10 cm / alpine high temperature -6 C / freezing level 1600 m

Avalanche Summary

On Sunday, there were reports of several natural and human triggered wet and dry loose avalanches up to size 1.5 at treeline and in the alpine on south aspects and slab avalanches up to size 2 in the alpine on north aspects.On Saturday, there were reports of several natural, human and explosives triggered wind slab and storm slab avalanches up to size 1.5 at treeline and alpine elevations.On Friday, there were reports of a few size 1 human triggered storm slab avalanches.

Snowpack Summary

15-35 cm of recent storm snow sits on a melt-freeze crust on all aspects except for north facing slopes above 2000 m, where it sits on dry snow and surface hoar (feathery crystals). Recent snowfall amounts taper quickly below treeline.Snow is disappearing rapidly at lower elevations.

Problems

Wind Slabs

Up to 35 cm of recent storm snow sits on a crust in most locations, and on dry snow on north facing alpine terrain. Expect wind slabs in lee features at ridgetop.

Be careful with wind-loaded pockets, especially near ridge crests and roll-overs.

Aspects: North, North East, East, North West.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Apr 9th, 2019 2:00PM