Avalanche Forecast

Issued: Dec 10th, 2022 4:00PM

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

Avalanche Canada GL, Avalanche Canada

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Be vigilant regarding the persistent weak Surface hoar layer down 30cm. If the snow above become more cohesive into a slab condition, it could wake up unexpectedly.

Summary

Confidence

Moderate

Avalanche Summary

No field patrol occurred Saturday. No new avalanches have been observed or reported in the last 2 days.

Snowpack Summary

5-10cm of snow arrived Dec 8th which overlies previous Windslab surfaces formed by Dec 7-8th Moderate Southwest winds in the alpine. A surface hoar layer is down 25-35cm and is located in Treeline sheltered areas. The snowpack ranges from 40-100cm deep and can be unsupportive in locations.

Weather Summary

Weather for Parkers ridge Saturday night will be light snow, -9 °C, and light Southwest winds. Expect on Sunday sun and cloud, no new snow, -6 °C, and light winds. Monday and Tuesday is forecasted to be similar to Sunday.

Terrain and Travel Advice

  • Surface hoar distribution is highly variable. Avoid generalizing your observations.

Problems

Wind Slabs

An icon showing Wind Slabs

Winds have tapered off into the light range yet this condition persists in Alpine start zones from previous moderate to strong winds.

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

Elevations: Alpine.

Likelihood

Possible - Likely

Expected Size

1 - 2

Persistent Slabs

An icon showing Persistent Slabs

Marmot Basin Ski area reports buried surface hoar extending into some alpine features. Investigate this layer before committing to terrain. Whumpfing and shooting cracks have been observed on this layer yet but no natural avalanches have been observed as a result.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2.5

Valid until: Dec 11th, 2022 4:00PM

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