Bulletin d’avalanche

Cariboos

Mar 29 – 30, 2013Avalanche Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Be alert to conditions that change with daytime warming. Danger ratings may exceed posted levels when solar radiation is strong.

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–7
    Cornices weaken with daytime warming and become more likely to fail.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    3–7
    Large loads like cornice falls, or lighter loads in thin snowpack areas may trigger the deeply buried March 10th surface hoar layer.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–4
    Expect loose sluffs to run in the heat of the day when the sun is strong.

Confidence

Fair - Timing or intensity of solar radiation is uncertain on Saturday

Weather Forecast

No precipitation is expected for the forecast period. Although broken cloud is forecast on Saturday, generally clearing skies are expected on Sunday and Monday.Winds will be light from the northwest on Saturday, switching to light and southwesterly Sunday and Monday.Freezing levels will hover at about 1800m on Saturday, 2000m on Sunday and then 2200m on Monday.

Avalanche Summary

Natural wet-loose avalanches up to Size 2.5 continue to be reported from throughout the region on solar aspects. Isolated cornice releases up to 2.0 have also been reported.

Snowpack Summary

Clear, warm days and cold nights have brought spring's daily melt freeze cycle to the surface snow on sunny aspects into the alpine and all aspects at lower elevations (below 1800m). Surface hoar is growing on high shaded terrain and the cold temperatures have broken down the windslabs in lee features in the alpine. Cornices are huge!The weak layer of buried surface hoar from March 10th is buried more than 100cm in most places, and is giving variable results in snow profile tests. Although unlikely to trigger, this deep persistent weakness remains a concern because of the potential for very large avalanches particularly with heavy triggers such as cornice falls or lighter triggers in thin snowpack areas.

Régions couvertes