Bulletin d’avalanche

Northwest Coastal

Dec 24 – 25, 2024Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

Continually assess conditions as you move through terrain and be prepared to dial back objectives.

Whumphing, shooting cracks and avalanches are indicators of unstable conditions.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–3

    New storm and wind slabs will likely be sensitive to rider traffic.

    Storm and wind slab avalanches have the potential to step down to the weak layers mentioned in the snowpack summary.

Confidence

Low

Avalanche Summary

On Sunday several natural wind slab avalanches were reported in the north of the region. These avalanches were up to size 3  and on northerly aspects in the alpine.

No new avalanches were reported in the south of the region where observations are limited.

Snowpack Summary

By 4 pm on the 24th  up to 20 cm of new snow may have fallen. This new snow will fall on an already heavily wind affected upper pack in the alpine and at treeline. Below treeline the snow surface is moist.

Two weak layers exist in the top meter of the snowpack from earlier in December. A layer of facets and/or surface hoar down 20 to 40 cm and a crust down 40 to 80 cm.

Treeline snow depth range from 200-280 cm. The lower snowpack has no layers of concern.

Weather Summary

Monday Night

Cloudy with around 5 cm of snow. 20 to 40 km/h east ridgetop wind. Treeline temperature -2 °C. Freezing level around 1000 m.

Tuesday

Mostly cloudy with 5 to 15 cm of snow. 20 to 50 km/h southeast ridgetop wind. Freezing level around 1200 m.

Wednesday

Cloudy with 5 to 15 cm of snow. 30 to 50 km/h southeast ridgetop wind. Freezing level rising to 1500 m.

Thursday

Mostly cloudy with around 15 cm of snow. 25 to 50 km/h southeast ridgetop wind. Freezing level around 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't let storm day fever lure you into consequential terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.

Régions couvertes