Bulletin d’avalanche

South Columbia

Nov 23 – 24, 2013Avalanche Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

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

Forecast produced with limited field observations.  If you're in the field, please send any information to:[email protected]

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4
    Wind slabs persist in the alpine and at tree line especially on lee slopes

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–5
    A crust layer buried near the base of the snowpack will remain problematic for some time to come, with the possibility of producing large and destructive avalanches.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–4
    Rising temperatures can produce wet sloughs on southerly aspects and may trigger deeper instabilities

Snowpack Summary

Recent storm snow is settling and will gain strength with time and warming temps. Wind slabs linger in lee terrain. Surface hoar buried in early November exists in the mid snowpack but due to a lack of data little is known about its reactivity. The October crust/facet interface buried in the lower snowpack will likely be of concern for the foreseeable future. Valley fog and cold clear temps are producing a new surface hoar layer at fog levels and in sheltered north aspects.

Confidence

Fair - Due to the number and quality of field observations

Weather Forecast

Cool temps will give way to gradual warming for the forecast period with freezing levels going up to 3000 M in the next few days. No significant precipitation is in the forecast for the next 7 days. Winds are expected to be generally light to moderate for the forecast period.

Avalanche Summary

High winds accompanying the last significant snowfall produced wind slabs in exposed alpine and tree line locations producing avalanches up to size 3. Rising temps may produce wet sloughs on steep S facing alpine slopes and could trigger deeper instabilities

Régions couvertes