Avalanche Forecast

Issued: Jan 18th, 2021 4:00PM

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

Cory Boschman,

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Great skiing can sill be found in sheltered areas. Avoid wind effected terrain for both safety, and quality.

Summary

Weather Forecast

Tuesday: Cloudy with sunny periods and isolated flurries. High -8 C. Ridge wind west: 25-65 km/h.

Wednesday: Cloudy with sunny periods and isolated flurries. Low -15 C, High -10 C. Wind west: 15 km/h gusting to 45 km/h.

Snowpack Summary

30cm of unconsolidated surface snow continues to settle. The alpine and wind prone tree line areas have seen a lot of moderate to strong winds promoting wind effect, wind slab formation and cornice growth. The midpack is supportive. Spotty buried surface hoar can be found down 30cm and 70cm in sheltered and shaded locations below treeline

Avalanche Summary

No new avalanches observed on field patrol Sunday, but significant whoomphing was observed in low angle wind effected terrain.

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Confidence

Due to the quality of field observations

Problems

Wind Slabs

An icon showing Wind Slabs

Previous moderate to strong westerly winds in the alpine and exposed treeline have redistributed the snow well down into the terrain.

  • Avoid steep convexities or areas with a thin or variable snowpack.
  • Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1.5 - 3

Persistent Slabs

An icon showing Persistent Slabs

Use caution around thin to thick areas. Keep an eye out for surface hoar in isolated sheltered locations below treeline. A Dec weak layer exists in West facing alpine features and could be reactive to human traffic, wind loading and solar input.

  • Dig down to find and test weak layers before committing to a line.
  • Avoid exposure to overhead avalanche terrain during periods of moderate to intense transport.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Jan 19th, 2021 4:00PM

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