Bulletin d’avalanche

North Columbia

Apr 6 – 7, 2019Avalanche Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Wind slabs may be reactive to human triggering at upper elevations.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Up to 30 cm of recent storm snow sits on a crust in most locations, and on dry snow on north facing alpine terrain. Strong southwest winds will have formed wind slabs at upper elevations.

Confidence

Moderate -

Weather Forecast

SATURDAY NIGHT - Cloudy with isolated flurries / southwest winds, 30-50 km/h / alpine low temperature near -7SUNDAY - Mainly cloudy with scattered flurries / southwest winds, 10-30 km/h / alpine high temperature near -5 / freezing level 1700 mMONDAY - A mix of sun and cloud with isolated flurries / southeast winds, 10-20 km/h / alpine high temperature near -4 / freezing level 1800 mTUESDAY - Mainly cloudy with scattered flurries / northwest winds, 10-20 km/h / alpine high temperature near -2 / freezing level 1900 m

Avalanche Summary

On Friday, there were reports of a few natural and human triggered storm and wind slab avalanches up to size 2. These were mainly on north to east aspects in the alpine.On Thursday, there were several reports of natural and human triggered storm slab avalanches up to size 1.5, as well as a few natural loose wet avalanches up to size 1.5.On Tuesday, there were two reports of glide slab avalanches, size 1 and 2.5. These occurred on southeast aspects between 2200-2400 m. Both released on rock slabs.

Snowpack Summary

10-30 cm of recent storm snow sits on a melt-freeze crust on all aspects except for north slopes above 2000 m, where it sits on dry snow and surface hoar (feathery crystals) in some areas. Recent snowfall amounts taper quickly below treeline.North facing slopes above 2000 m may also have a layer of sugary faceted snow buried 50 to 70 cm.Snow is disappearing rapidly at lower elevations.

Régions couvertes