Bulletin d’avalanche

Northwest Coastal

Jan 21 – 22, 2013Avalanche Canada
Voir sur la carte
Archivé · expiré 14 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Hard and soft wind slabs may be found on many slopes, even below treeline. It may be possible to trigger a wind slab with the weight of a person or snowmobile.

Avalanche Summary

A snowcat triggered a size 2 slab on a cross loaded north aspect at 1400 m on Sunday. A recent natural size 1.5 avalanche was also observed on a steep SW aspect near Terrace.

Snowpack Summary

The current medley of snow surfaces includes hard and soft wind slabs, scoured slopes, blue ice and thin melt-freeze crusts. A persistent weakness of surface hoar buried at the end of December sits about 50-70cm below the surface. Recent snowpack tests gave moderate to hard, sudden results on this layer. The mid and lower snowpack is generally well settled and strong, although basal facets remain a concern in the north of the region.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain for the entire period

Weather Forecast

Tuesday: Moderate to strong SW wind.  Alpine temperature near -2. Light snow, starting late in the day.Wednesday: Light to moderate S wind.  Alpine temperature near -5. Moderate snow.Thursday: Increasing S winds. Alpine temperature near -5. Moderate snow.

Régions couvertes