Bulletin d’avalanche

South Coast

Mar 8, 2018Avalanche Canada
Voir sur la carte
Archivé · expiré 9 years ago

Danger d’avalanche

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

Points saillants

Avalanche danger will increase as snow accumulates at higher elevations.

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2.5
    Cornices are inherently unstable, unpredictable, and demand respect. New snow and warming could make cornices extra brittle.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Fresh storm slabs will build throughout the day at higher elevations and be most reactive on wind-loaded slopes.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–1.5
    Rain is possible up to treeline elevations, which could weaken the surface snow and trigger loose wet avalanches.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Thursday

Weather Forecast

THURSDAY: Precipitation starting Wednesday night with 5 mm by the morning and another 10-20 mm possible by Thursday afternoon. Freezing level will be steady around 1300 m so expect a mix of rain and snow at treeline elevations. Moderate south wind.FRIDAY: Flurries continue over Thursday night and into Friday bring 10-20 cm of snow by the morning, clearing in the afternoon, light wind, freezing level dropping to around 800 m.SATURDAY: Mostly sunny, light wind, freezing level rising to around 1600 m.

Avalanche Summary

No recent avalanches have been reported.A MIN report from just outside the region near Squamish on Sunday (Watersprite Lake) describes a natural size 2 avalanche that failed on a south aspect at 1750 m (see photo and details here). Sparse observations from the Squamish area over the past week suggest the snow from last week's storm may still be unsettled in that area.

Snowpack Summary

New snow will accumulate on Thursday and Friday and form extra deep deposits in wind loaded terrain. The new snow is falling on a sun crust on steep south-facing slopes, cold dry snow on polar aspects, and an overall well settled snowpack.Cornices have formed on many alpine ridgelines. They will become touchier as they grow in size, as temperatures rise, and as they are subject to the strong late-winter sun on clear days.

Régions couvertes