Avalanche Forecast

Issued: Dec 9th, 2022 4:00PM

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

Avalanche Canada istorm, Avalanche Canada

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For the best riding seek out sheltered slopes with the deepest snowpack that hasn't been wind-affected. Be extra cautious at treeline and higher elevations on the downwind side of ridges and rib features.

Summary

Confidence

Moderate

Avalanche Summary

No new reports since the weekend. Keep sharing your observations via the MIN; it helps strengthen our information gathering.

Snowpack Summary

In deeper zones near ridges the snowpack is around 120 to 170 cm, which is low for early December. Alpine terrain in windy areas is scoured and bare.

Surface: Boot top powder in deep areas. Same old crusts, facets, and rocks on wind scoured slopes.Upper-pack: In sheltered areas below the fresh snow is well developed surface hoar. Generally there's 40 to 70 cm of low density and faceting (aka weak) snow in the upper pack.Mid-pack: November crust, with a layer of soft facets above. This is the primary weak layer, found pretty much halfway down.Lower-pack: a mixture of old crusts and facets but some suggestions that these layers are a bit harder or stronger than what's found in other regions (e.g. Duffy or Hurley).

Weather Summary

Friday NightIncoming system bringing just a few cm of snow overnight and moderate southerly wind. Temperatures around -5 to -10 C at treeline and higher elevations.

SaturdayA few more cm of snow. Steady temps around -5 C up in the mountains. Freezing level rising to near 1500 m. Moderate southerly winds.

Sunday

Dry to possibly a few cm of snow. Light wind from the north. Steady temps around -5 C and colder at treeline. Freezing level lowering to around 1000m Mostly cloudy.

Monday

Clearing. Dry. Temps cooler at around -10 C at treeline. Light northerly wind.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.

Problems

Wind Slabs

An icon showing Wind Slabs

With minimal new snow expected, the wind slab problem should be confined to isolated pockets on the lee side of ridges or ribs. However, with the sugary-faceted-weak snowpack avalanches could potentially step down to the middle of the snowpack.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Valid until: Dec 10th, 2022 4:00PM

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