Avalanche Forecast

Issued: Feb 8th, 2015 8:47AM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is considerable. Known problems include Storm Slabs and Persistent Slabs.

Avalanche Canada ghelgeson, Avalanche Canada

It's easy to feel euphoric when the snow is deep, it's sunny, and you're out with your buds. Be careful not to let that mind set lead you out of conservative terrain Monday.

Summary

Confidence

Fair

Weather Forecast

Looks pretty pleasant Monday and Tuesday. The freezing level should stay at the valley bottom, there will likely be periods of sunshine and winds should be light at all elevations. The next storm system starts to affect the region Tuesday night. This one is a bit warmer, the freezing level should increase to around 1500m, winds are once again expected to be extreme SW at ridgetop and 5 to 10cm are expected Tuesday Night. Look for another 5 to 15cm Wednesday and another 5 to 15cm Wednesday night.

Avalanche Summary

Scanning the facebook posts it sounds like at least two folks were involved in avalanches Saturday.  Control work Saturday produced slab and loose dry avalanches to size 2.5 from virtually all aspects and elevations. It sounds like a lot of these were running on mid storm instabilities.

Snowpack Summary

The NW Coast is THE place to be in the province right now. Arctic air has kept things cool and the snow totals are substantial. The storm produced 50 to 100cm accompanied by screaming winds out of the E through SE. Initial observations are limited, but there are reports of 75 cm of wind affected snow at and above treeline. The late-January crust is thought to be down 50 to 150cm in the south of the region and about half this depth in the north. This crust may have surface hoar on it. The mid-January rain crust and/or surface hoar layer is down over 150cm in the south and has generally become inactive though it may still be a concern in thinner snowpack areas. The November crust/facet combo near the bottom of the snowpack is thought to be generally well bonded but may still be reactive in the far north of the region.

Problems

Storm Slabs

An icon showing Storm Slabs
Natural avalanches have ceased and this is when it gets tricky.  You may be gaining a bit of confidence, but this is when you're most likely to get involved in a wreck.  Give yourself a healthy margin for error if you're looking to step out today.
Slopes receiving direct sun for the first time since the storm could produce natural avalanches.>The new snow will require several days to settle and stabilize.>Be very very cautious if you decide to step out into more challenging terrain.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

2 - 6

Persistent Slabs

An icon showing Persistent Slabs
Limited observations mean there's a ton of uncertainty concerning the deeper problem layers in the snowpack. I would manage this by assuming that every slope above treeline has the potential to produce a very large and destructive avalanche.
Be aware of the potential for large, deep avalanches due to the presence of buried crusts and/or surface hoar.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

4 - 7

Valid until: Feb 9th, 2015 2:00PM

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