Avalanche Forecast

Issued: Jan 19th, 2015 7:52AM

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

Avalanche Canada Peter, Avalanche Canada

Conditions are improving but continue to exercise caution in wind affected terrain and during periods of intense sunshine. 

Summary

Confidence

Good

Weather Forecast

Synopsis: A building ridge of high pressure should give the South Coast dry conditions with a mix of sun and cloud for the next few days. The freezing level is around 1000 m on Tuesday but could bump up to 1800-2000 m on Wednesday/Thursday. Ridge winds should be light and variable. The next significant weather system might reach our region on Friday bringing moderate snow or rain.

Avalanche Summary

Numerous skier and explosive triggered slabs were reported on the weekend - most were size 1-1.5 and involved the recent storm snow. No new natural avalanches were reported but visibility was poor during the storm. Rider triggering remains a concern, particularly in wind loaded terrain near ridge tops.

Snowpack Summary

Two recent pulses of snow accompanied by strong S-SW winds have built deep wind slabs above a hard crust and/or surface hoar. The buried crust is most pronounced between about 1500 m and 2200 m. The distribution of the surface hoar seems spotty across the region, but some operators found it to be widespread in their tenure before the snow began burying it. Where the surface hoar exists, whumpfing indicates the touchiness of this interface. Deeper snowpack weaknesses (curst/facet and/or surface hoar layers formed in November and December) have fallen off the radar, but they could be reawakened with a very heavy load (like a cornice fall or wind slab) in the wrong spot (like a thin snowpack area, or high elevation northerly aspects where there is no strong crust above).

Problems

Wind Slabs

An icon showing Wind Slabs
Recent winds have left deep wind slabs on lee slopes which could be triggered by the weight of a person in steep unsupported terrain.
Back off if you encounter any cracking or whumpfing.>Travel on ridgetops to avoid wind slabs on slopes below.>Give cornices a wide berth when travelling on or below ridges.>

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 4

Loose Wet

An icon showing Loose Wet
Loose wet slides are possible in steep sun-exposed terrain during the day. Move to cooler, shady slopes if the snow surface starts to become moist or wet.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Jan 20th, 2015 2:00PM

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