Avalanche Forecast

Issued: Feb 8th, 2013 8:32AM

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

Avalanche Canada pmarshall, Avalanche Canada

Summary

Confidence

Good

Weather Forecast

Synopsis: A ridge of high pressure off the coast of BC should maintain mostly dry conditions and sunny skies through the weekend and into next week. A weak disturbance sliding south through Alberta on Saturday could spread more cloud with a slight chance of flurries. The freezing level should remain near valley bottom and 1400 m. Winds are generally light to moderate from the west-northwest.

Avalanche Summary

There is one new report of a size 1.5 slab avalanche from a steep south aspect in the alpine that appeared to involve the recent storm snow. There were also a few size 1 loose snow avalanches were reported running out of steep headwall features.

Snowpack Summary

Up to 15 cm of recent snowfall has been redistributed into dense or hard wind slabs at higher elevations from variable winds. These accumulations overlie old wind slabs in exposed areas, settled storm snow or spotty surface hoar in more sheltered terrain, and a crust on previously sun-exposed slopes. A variable interface (surface hoar/facets/sun crust) was buried on Jan 23 and is down about 20-40cm. In most locations it now appears to be well bonded. The lower snowpack is generally well-settled. Cornices in the region are reported to be well developed and loom over heavily used slopes. These cornices deserve our respect, especially with clear skies and warming forecast for the weekend.

Problems

Wind Slabs

An icon showing Wind Slabs
Pockets of wind slab are likely to exist at higher elevations on a variety of aspects and may react to the weight of a skier/rider.
Be cautious as you transition into wind affected terrain.>Highmark or enter your line well below ridge crests to avoid wind loaded pillows.>

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Cornices

An icon showing Cornices
Large and potentially weak cornices loom over open slopes. Pay particular attention to cornices with solar warming forecast for the weekend.
Give cornices a wide berth when travelling on or below ridges.>

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 4

Valid until: Feb 9th, 2013 2:00PM