Avalanche Forecast

Issued: Feb 23rd, 2015 8:42AM

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

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Summary

Confidence

Fair - Wind speed and direction is uncertain on Tuesday

Weather Forecast

Tuesday: Increasing cloud cover, light SW winds at valley bottom, strong NW winds at ridgetop. No precipitation, freezing level rising to 1500m. Wednesday: Mostly clear skies, winds decreasing to light NW throughout the day, no precipitation, freezing level rising to 1500m. Thursday: Broken skies, light variable winds at all elevations, no significant precipitation, freezing level rising to 1400m.

Avalanche Summary

Isolated small wind slabs on north aspects were reported Sunday, no other significant avalanche activity to report.

Snowpack Summary

Up to 5cm of snow covers a widespread layer of surface hoar above a crust that extends all the way to ridge crest. The curst is effectively "capping" the snowpack and doing a good job of protecting the buried weak layers bellow. However, I suspect that the mid-January surface hoar layer could still produce an avalanche if given a large enough trigger in the right spot. It can be found down about 1m in the alpine and 50-60cm at treeline. The mid-December crust/facet/surface hoar weakness may persist in the mid to lower snowpack at higher elevations.

Problems

Wind Slabs

An icon showing Wind Slabs
Strong NW winds may create isolated pockets of wind slab in wind exposed features Tuesday. It's important to factor these small but potentially touchy wind slabs into your travel plan for the day, especially if you're in complex terrain.
Be cautious as you transition into wind affected terrain.>Highmark or enter your line well below ridge crests to avoid wind loaded pillows.>Use ridges or ribs to avoid pockets of wind loaded snow.>

Aspects: North, North East, East, South East, South.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Feb 24th, 2015 2:00PM

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