Avalanche Forecast

Issued: Dec 8th, 2011 10:03AM

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

Avalanche Canada ghelgeson, Avalanche Canada

Summary

Confidence

Fair - Due to limited field observations

Weather Forecast

A strong ridge of high pressure remains anchored off the BC coast & will continue to influence the region through the weekend. The good news is that the ridge begins to break down early next week which means that conditions will be more favorable for snow in the interior ranges. For Friday, winds will continue to be out of the W-SW at light to moderate values. We'll see a slight temperature inversion in the Alpine Friday, but I'm not expecting anything too dramatic. Freezing levels should creep down to at least 800m, likely a bit lower on Friday night. Mostly sunny skies are forecasted for Friday with a daytime high of -2 @ 1500 m & an overnight low of -11. Saturday looks very similar with a smidge more cloud building into the region.

Avalanche Summary

No recent avalanche activity has been reported. If you have any avalanche observations to report, please email us at: forecaster@avalanche.ca.

Snowpack Summary

Some great observations have come our way recently. While there are a few players in the snowpack, none of them seem to be doing anything at the moment. A rain crust is present just below the snow surface below 1800m. The crust, in combination with cool temperatures, has really settled things out at & below treeline. My main concern is the odd lingering windslab still scratching out a living in the alpine. But, I know that this is less & less of an issue every day. I'm thinking about bringing the Alpine Danger down to Low for the weekend. In order to feel comfortable with that I need some more feedback/observations. If you're out & about please drop me a line & let me know what you're seeing: forecaster@avalanche.caThe snowpack sounds pretty well organized at the moment. A bit of soft fist snow can be found in upper elevations with a good tight midpack consisting of more dense snow below. The alpine is holding 150-200cm. Treeline depths are between 50 -150cm. Recent snowpack observations indicate that the late October rain crust is present in the alpine elevations and down approximately 120cm. This crust is said to be up to 5mm in thickness with faceting below it. For the moment the crust seems to be bridging over the facets below, with a well settled 1F - P midpack above.

Problems

Wind Slabs

An icon showing Wind Slabs
These wind slabs are getting old & tired, but you may still find the odd rider trigerable wind slab in lee locations near ridgetop.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Dec 9th, 2011 8:00AM