Bulletin d’avalanche

Kootenay Boundary

Apr 4 – 5, 2018Avalanche Canada
Voir sur la carte
Archivé · expiré 8 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Winter continues. Snow forecast for Thursday is expected to add to existing storm slabs.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2.5
    Snow and wind are expected to build slabs which could be triggered with the weight of a person.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

THURSDAY: 5-10 cm snow. Light to moderate south-easterly winds. Freezing level near 1500 m.FRIDAY: Light snow. Light winds. Freezing level near 1600 m.SATURDAY: Moderate snow. Light winds. Freezing level near 1600 m.Weather models disagree on the amount of snow expected this week.

Avalanche Summary

A skier-triggered size 2 storm slab was reported on a south-west aspect at treeline on Tuesday. A few loose moist size 1 avalanches were observed in steep sunny terrain on Wednesday.

Snowpack Summary

Up to 50 cm recent snow is slowly settling. Storm snow overlies variable surfaces including hard crusts on all aspects below 1900 m, and sunny aspects higher up. On high, shady aspects, the new snow may sit on some old wind slabs from last week, or a mix of large surface hoar and surface facets. Another weak layer buried in mid-March is down 50 to 120 cm and is a crust on solar aspects and surface hoar (to 6mm) on high elevation north aspects. Deeper weak layers are generally considered dormant.

Régions couvertes