Avalanche Forecast

Issued: Apr 18th, 2014 9:02AM

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

Avalanche Canada rbuhler, Avalanche Canada

Summary

Confidence

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

Weather Forecast

Unsettled conditions are expected for Saturday morning before the next low pressure system hits the south coast Saturday afternoon or evening. Mainly overcast conditions and light precipitation are expected for Sunday and Monday.Saturday: Precipitation 4-8mm, freezing level am: 1000m pm: 1600m, ridgetop wind: light increasing to moderate S-SWSat. Night: Precipitation 5-10mm, ridgetop wind: moderate SWSunday: Precipitation 2-4mm, freezing level am: 1200m pm: 1500m, ridgetop wind: light-moderate S-SWSun. Night/Monday: Precipitation 3-6mm, freezing level am: 1400m pm: 1800m, ridgetop wind: moderate S-SW

Avalanche Summary

On Thursday, several ski-cut wind slabs up to size 1.5 were reported down 10-40cm as well as natural loose wet sluffing from steep rocky features during periods of solar warming. 

Snowpack Summary

The new snow sits on a melt-freeze crust which exists on all aspects up to 2000m and to mountain-top on sun-exposed slopes. The recent warmer temperatures have helped to strengthen and settle the upper snowpack. Freezing levels have been rising as high as 2000m recently and snow is reported to be moist or wet to this elevation.  In the alpine where the snow remains dry, moderate-strong SW winds have formed wind slabs in leeward features. Large sagging cornices remain a concern, especially during periods of warming. The deep and destructive early February facet/crust layer is now close to 200 cm below the surface. This layer is largely dormant at this time; however, it should remain on your radar, especially when freezing levels are high and the sun is shining.

Problems

Storm Slabs

An icon showing Storm Slabs
New snow may form storm slabs at higher elevations. Stiffer wind slabs have formed in leeward alpine terrain features from moderate-strong S through W winds.
The new snow will require several days to settle and stabilize.>Avoid freshly wind loaded features.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 3

Loose Wet

An icon showing Loose Wet
Rain at lower elevations will saturate and destabilize the upper snowpack. Loose sluffing from steep terrain features is possible, especially from human-triggering.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>Be cautious of sluffing in steep terrain.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Apr 19th, 2014 2:00PM

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