Avalanche Forecast

Issued: Feb 17th, 2013 8:44AM

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

Avalanche Canada ghelgeson, Avalanche Canada

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Sea To Sky.

Summary

Confidence

Good

Weather Forecast

Monday:  Freezing Level: 700m, Wind: Lht. S, No significant precip.Tuesday: Freezing Level: 500m in the morning increasing to near 1000m in the afternoon. Wind: Light N/NW, No significant precip.Wednesday: Freezing Level: 250m increasing to 750 in the afternoon. Wind: Light SW.  No significant precip.

Avalanche Summary

On Saturday activity was limited to small size 1 wind slab avalanches in wind exposed terrain near ridgecrest.

Snowpack Summary

Relatively small pockets of wind slab which exist at higher elevations are expected to be mostly unreactive. but may be triggered by skiers in isolated pieces of terrain near ridge crest.  In shaded areas at treeline and below the new snow may overlie surface hoar which is reported to be reactive in the Meager Group (upper Lillooet). Several crusts can be found in the snowpack, especially on solar aspects; however, reports indicate these interfaces have settled out fairly rapidly in most areas. The mid and lower snowpack layers are generally strong and well settled.Total snow depths vary from around 400 cm in the south to around 180 cm in the north.

Problems

Wind Slabs

An icon showing Wind Slabs
You may find the odd small wind slab in isolated terrain in the Alpine. Watch for triggering in gullies and in the lee of ridge crests too.
Be careful with pockets of wind slab near ridgecrest.>Plan escape routes and identify safe zones before committing to your line.>

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Feb 18th, 2013 2:00PM

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