Bulletin d’avalanche

North Columbia

Mar 23 – 24, 2019Avalanche Canada
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Archivé · expiré 8 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

The best riding will likely be on northerly aspects up high, but travel with caution, as a buried weak layer may still exist. You may also find wet snow, which could be sensitive on Sunday with enough warming.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5
    A 40 to 60 cm thick slab of snow may be poorly bonded to weak, sugary faceted snow. This layer is likely most problematic on northerly aspects above 2000 m, where it may be associated with hard, wind-affected snow.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5
    The snow may weaken at lower elevations or on sun-exposed slopes, depending on if it rains or if the clouds clear. If the snow feels slushy, there is potential for triggering a loose wet avalanche.

Confidence

High -

Weather Forecast

SATURDAY NIGHT: Partly cloudy, light east wind, alpine temperature -3 C, freezing level 1900 m.SUNDAY: Mix of sun and clouds, light southeast wind, alpine temperature -1 C, freezing level 2000 m.MONDAY: Cloudy with light snowfall, accumulation 2 to 5 cm, light south wind, alpine temperature -2 C, freezing level 1700 m.TUESDAY: Cloudy with light snowfall, accumulation 5 cm, light south wind, alpine temperature -3 C, freezing level 1500 m.

Avalanche Summary

The wet loose avalanche cycle from last Sunday to Friday has likely diminished, as cooler, seasonal temperatures returned to the mountains on Saturday. Evidence of the cycle is widespread at all elevations, with avalanches up to size 3 mostly on southeast to southwest aspects. A few large slab avalanches were also triggered on all aspects, with many of them running to valley bottom.

Snowpack Summary

A melt-freeze crust is found on the snow surface everywhere except for northerly aspects above 2000 m, where dry snow still prevails. The crust may weaken into moist or wet snow at low elevations or on southerly aspects, depending on daytime warming and cloud cover.The remainder of the snowpack is generally consolidated and strong. The exception may be on northerly aspects above 2000 m, where a weak layer of faceted grains buried 40 to 60 cm may still exist in combination with old and hard wind-affected snow.

Régions couvertes