Bulletin d’avalanche

Northwest Coastal

Dec 10 – 11, 2013Avalanche Canada
Voir sur la carte
Archivé · expiré 13 years ago

Danger d’avalanche

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

Points saillants

The new storm has started and danger ratings are increasing.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–4
    New storm snow and strong Northwest or Westerly winds should develop a touchy storm slab above recently faceted surface snow and wind crusts.

Weather Forecast

Overnight and Wednesday: A strong frontal system is expected to arrive overnight bringing moderate to heavy precipitation 30-40 cm. The freezing level jumps up to around 1000 m and winds are strong from the Southwest. Thursday:Continued moderate precipitation combined with moderate to strong Southwest winds. The freezing level remains close to 1000 m.Friday:There should be a bit of a lull between storms. Very little precipitation and moderate Westerly winds

Avalanche Summary

Avalanche activity is expected to increase through the week as snow accumulates and temperatures increase.

Confidence

Fair - Timing, track, or intensity of incoming weather system is uncertain on Wednesday

Snowpack Summary

Snowpack depths are highly variable across the region, with elevation, and in wind-exposed areas. Recent cold and clear weather has resulted in surface hoar formation and near-surface faceting, which is now getting buried by light dry snow. Low-elevation and wind-affected areas have a shallow faceted snowpack. While in higher elevation sheltered areas the previous storm snow is settling and gaining strength; however, weaknesses at the old snow interface down approximately 40cm may still exist. The lower snowpack is a series of crusts, some of which are laminated with facets, particularly in shallower areas.

Régions couvertes