Bulletin d’avalanche

North Bulkley

Jan 21 – 22, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Avalanche activity has decreased, but reactivity may remain in wind-affected areas.

Seek out sheltered terrain if winds are moving snow and forming fresh slabs.

Problèmes avalancheux

  • Wind Slabs

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

    Expect stiffer and deeper deposits of snow on northeast and southeast facing slopes. Watch for steep convex rollovers, ridgetop entrances, and cross loaded features.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3

    A widespread crust with facets is buried 50 to 100 cm deep. Wind slabs may step down to this layer, producing large avalanches.

Snowpack Summary

20 cm of recent storm snow has been heavily wind affected in exposed areas. A crust exists below 1250 m, making for challenging travel conditions.

Check out this MIN for a conditions update near Smithers.

A weak layer of facets and a crust is buried 50 to 100 cm deep. This has shown recent reactivity with the new load from wind and snow. Reactivity moving forward is uncertain.

Confidence

Low

Avalanche Summary

Avalanche activity appears to have tapered since the storm with wind and persistent slabs observed through to Saturday. Activity primarily occurred on north through east aspects at alpine elevations.

This size 2 rider triggered avalanche occurred on an east facing alpine slope. Notably, the avalanche was triggered as a wind slab and stepped down to the buried weak layer. Photo below.

Weather Summary

Monday Night

Increasing cloud with flurries. 40 to 50 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Tuesday

A mix of sun and cloud. 30 to 40 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Wednesday

Cloudy with 5 cm of snow. 40 to 50 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Thursday

Cloudy with 5 cm of snow. 40 to 50 km/h west ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Régions couvertes