Bulletin d’avalanche

South Coast Inland

Dec 9 – 10, 2022Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

For the best riding seek out sheltered slopes with the deepest snow that hasn't been wind-affected.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5

    With expected storm snow accumulations of less than 15 to 20 cm there should be a standard wind slab problem with pockets of cohesive snow on the lee side of ridges or ribs. However, with the sugary-faceted-weak snowpack avalanches could step down to the middle of the snowpack.

Terrain and Travel Advice

  • 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.
  • Expect shallow snow cover that barely covers ground roughness.

Confidence

Moderate

Avalanche Summary

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

Snowpack Summary

In deeper zones at 1900 m the snowpack is around 100-130 cm, which is low for early December.

Surface: Boot top powder in deep areas. Same old crusts, facets, and rocks on wind scoured slopes.Upper-pack: Below the fresh snow is well developed surface hoar in sheltered areas. The uppper part of the snow pack is generally low density and faceting (aka weak).Mid-pack: maybe a crust or two, with a layer of soft facets above. This is likely the primary weak layer.Lower-pack: facets and depth hoar (aka not strong).

Weather Summary

Thursday NightStorm winding down so only a trace of new snow overnight. SW wind diminishing to light. Treeline temps around -10 C

FridayMostly cloudy, flurries bringing just a trace of snow. SW wind light. Temps near treeline around -10 C.

Saturday

Another weak disturbance bringing 5 to 10 cm of snow with moderate southerly wind. Treeline temperatures around -10 C.

Sunday

Dry. Mostly cloudy. Light wind. Steady temperatures in the -5 to -10 range up at treeline.

More details can be found in the Mountain Weather Forecast.

Régions couvertes