Bulletin d’avalanche

Cariboos

Jan 30 – 31, 2013Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–4
    There is a lot of loose dry snow available for transport as the Northwest winds build. Watch for soft wind slabs developing in the lee of terrain features.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Two surface hoar layers lie buried under the surface, one approximately 40cm down and the other approximately 80cm down. Both are reported to be patchy and variable in distribution. Most likely triggered on steep convex rolls at treeline or below.

Confidence

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

Weather Forecast

Overnight and Thursday: The Northwest flow is expected to continue to push the cold arctic air to the East. Northwest winds moderate overnight becoming light Westerly. No precipitation is expected tonight, and light snow falls of 5-8 cms are expected on Thursday. Alpine temperatures gradually warming on Thursday and freezing levels rising to about 1300 metres.Friday: No precipitation is expected as a high pressure system in the South influences most of the interior mountain ranges. Expect high cloud or broken skies. Freezing level at about 800 metres.Saturday: High pressure should continue to influence. No precipitation expected, and freezing level at about 1000 metres.

Avalanche Summary

One natural slab avalanche size 1.5 was reported that was about 30 cms deep.

Snowpack Summary

Some areas in the Northern parts of the region received another 20-25 cms of dry light snow. The variable surfaces that were left behind by the end of the snow drought on January 23rd are now buried by 50-80 cms of incremental storm snow. In some areas the storm snow has settled into a 30 cm layer that may be reactive where it sits above a weak layer of old surface hoar or facets that grew during the drought. There is a lot of loose snow available for transport if the winds develop into strong values.

Régions couvertes