Avalanche Forecast

Issued: Jan 26th, 2018 4:59PM

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

Avalanche Canada jsmith, Avalanche Canada

New snow and wind continue to create touchy storm slabs reactive to human triggers, especially in wind effected areas at treeline and above.

Summary

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

SATURDAY: 10-20 cm of new snow / Moderate to strong southwesterly ridgetop winds / Freezing level rising to around 1000m.SUNDAY: 10-20 cm of new snow / Strong southwesterly ridgetop winds / Freezing level rapidly rising to around 1800m.MONDAY: 10-20 cm of new snow / Strong southwesterly ridgetop winds / Freezing level around 1800m.

Avalanche Summary

Two natural storm slab avalanches stepped-down to facets at the bottom of the snowpack and resulted in 3-3.5 avalanches. They occurred on north and south aspects between 2000 and 2250 m. The extended period of continuous loading of the snowpack may begin to reactivate deeply buried weak layers resulting in large and destructive avalanches running full path.

Snowpack Summary

15 cm of new snow on Friday morning brings recent storm totals to 70-100cm. Moderate southerly winds continue to redistribute the new snow. Last weekend's strong to extreme southeasterly ridgetop winds likely created dense storm slabs lurking in lee and cross-loaded features at treeline and above.90-120cm below the surface you'll likely find a few crusts that were buried during the first few weeks of January. Due to limited observations, not much is known about the current reactivity of these layers.The lower snowpack includes the mid-December crust layer. The load of the new snow may tip the balance and reactivate this layer in isolated terrain - particularly in the north of the region where it's shown prolonged reactivity in snowpack tests.

Problems

Storm Slabs

An icon showing Storm Slabs
New snow and wind continue to build storm slabs reactive to human triggers.
Be cautious as you transition into wind-affected terrain.Stay off recent wind loaded areas until the slope has had a chance to stabilize.The new snow may require several days to settle and stabilize.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Jan 27th, 2018 2:00PM

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