Bulletin d’avalanche

Northwest Coastal

Feb 1 – 2, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Recent snow is producing natural and human triggered avalanches.

Very large avalanches are still a concern in alpine terrain.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2.5–3.5

    The 150 to 250 cm deep weak layer from early December continues to produce large avalanches.

  • Storm Slabs

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

    Recent snow continues to produce natural and human triggered avalanches, in some cases stepping down to layers from early December.

Confidence

Moderate

Avalanche Summary

Recent snow and wind has produced a number of large and small natural and human triggered storm slab avalanches on all aspects and at all elevations.

On Thursday:

  • Two size 3 persistent slab avalanches were reported on southerly aspects in the alpine, both avalanches stepped down to layers from December. One of them was remote triggered from 30 m away!

On Wednesday:

  • A size 3 natural triggered persistent slab avalanche was reported on a north aspect in the alpine.

Snowpack Summary

There has been 30 to 60 cm of new snow since Wednesday, with southwest wind depositing more in lee areas.

This adds to previous snow, burying a surface hoar layer that is between 50 - 90cm deep.

Buried weak layers from December, 150 to 250 cm deep, include crusts, facets, and/or surface hoar, and continue to produce large avalanches.

Weather Summary

Friday Night

Mostly cloudy with up to 5 cm of snow. 20 to 30 km/h east ridgetop wind. Treeline temperature -18 °C.

Saturday

Mix of sun and cloud with flurries. 20 to 50 km/h northeast ridgetop wind. Treeline temperature -22 °C.

Sunday

Sunny. 30 to 70 km/h northeast ridgetop wind. Treeline temperature -22 °C.

Monday

Mostly sunny. 40 to 80 km/h northeast ridgetop wind. Treeline temperature -20 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Closely monitor how the new snow is bonding to the old surface.

Régions couvertes