Bulletin d’avalanche

Northwest Coastal

Dec 8 – 9, 2023Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

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

Points saillants

Carefully assess steep lines for wind slab. Wind slab could still be rider triggerable near ridge crests.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Wind slab could still be found near ridge crests in exposed treeline and alpine terrain.

    The most likely aspects where rider triggerable wind slab remains are north and northwest.

Avalanche Summary

A wide spread natural avalanche cycle occurred earlier this week during the storm. Since then avalanche activity has tapered off with only small explosive triggered avalanches reported on Wednesday.

Confidence

Moderate

Snowpack Summary

Wind slab can still be found on northerly aspects from previous southerly winds. At lower elevations a new crust has likely formed on all aspects.

The mid pack contains several crusts from November. In general the mid pack is well settled.

The snowpack depth is approaching two meters in the alpine but is still quite shallow below treeline.

Weather Summary

ursday Night

Mostly cloudy, up to 4 cm of new snow expected, south alpine wind 10 to 20 km/h, treeline temperature -6°C.

Friday

Mostly cloudy with up to  2 cm of new snow expected, south alpine wind 10 to 25 km/h, treeline temperature -3°C.

Saturday

Cloudy with 10 to 20 cm of new snow expected, southwest alpine wind 30 to 60 km/h, treeline temperature -3°C.

Sunday

Mostly clear with no new snow expected, variable alpine wind 5 to 15 km/h, treeline temperature -1°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Use ridges or ribs to avoid areas of wind loaded snow.

Régions couvertes