Avalanche Forecast

Issued: Feb 9th, 2014 8:54AM

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

Avalanche Canada ghelgeson, Avalanche Canada

Increased snowfall and strong SW winds will increase the hazard late Monday. If you see anything of interest, please let us know by submitting an observation using the CAC Mobile App.

Summary

Confidence

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

Weather Forecast

Synopsis: The ridge of high pressure has long overstayed its welcome. Thankfully it makes its exodus from the province opening the door to strong zonal flow that should deliver one storm after another this week. Game on.Monday: Freezing Level: 600m; Precip: 5/10 cm Wind: Light, SWMonday Night: Wind: Light SW | Strong/Extreme W/SW at ridgetop.Tuesday: Freezing Level: 900m; Precip: 5/10 cm Wind: Light/Mod SW | Strong W/SW at ridgetop.Wednesday: Freezing Level: 1000m; Precip: 15/20 cm Wind: Moderate SW | Strong/Extreme SW at ridgetop.

Avalanche Summary

The quantity of small wind slabs being triggered has dropped off in the last few days, but we continue to receive reports of isolated rider triggered wind slabs averaging size 1 from all aspects at and above treeline.

Snowpack Summary

Snow totals from the last pulse on Wednesday (140129) range from 5 - 20 cm with the greatest accumulations in the south of the region. This snow is faceting quickly in the cold temps. In wind exposed terrain, especially in the alpine, winds continue to form shallow wind slabs that are most prevalent immediately lee of ridgecrest. These variable wind slabs should stick around a bit longer than we're accustomed to as they are resting on a weak layer composed of large grained surface hoar (widespread in most sheltered and shaded areas at all elevations), a sun crust on open south facing slopes, faceted grains (in colder areas or areas with a thinner snowpack), or a combination of the above.Most of the snowpack is generally well consolidated. However, in thinner snowpack areas a facet/crust weakness may exist near the bottom of the snowpack. The depth of this layer makes human triggering unlikely, but the consequences of doing so could be disastrous.

Problems

Storm Slabs

An icon showing Storm Slabs
Light snowfall isn't expected to have a big impact Monday, but be sure that your plans allow for a safe exit from the backcountry as increasing snow and strong winds quickly increase avalanche hazard late in the day.
Remain vigilant for changing conditions.>Be cautious as you transition into wind affected terrain.>Scale back your exposure to avalanche terrain as hazard increases throughout the day.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

1 - 3

Valid until: Feb 10th, 2014 2:00PM