Bulletin d’avalanche

South Coast

Jan 25 – 26, 2014Avalanche Canada
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Archivé · expiré 13 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

Check out the latest blog post on deep persistent slab problems.

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Generally small, slow, and often limited to extreme cliffy terrain; however, these dense avalanches can easily knock you off your feet and take you for a ride.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    3–6
    Particularly a concern on shallow rocky southern aspects with heavy triggers. Warm temperature and sun-exposure are expected to increase the likelihood of triggering these facets deep in the snowpack. Cornice falls could also act as natural triggers.

Confidence

Fair - Timing or intensity of solar radiation is uncertain

Weather Forecast

Overnight and Sunday: Continued warm air at higher elevations. Mostly sunny with freezing level up to about 2700 metres. Light Northwest winds becoming Northeast in the late afternoon.Monday: Continued mostly sunny with valley cloud. Freezing levels moving down to about 2300 metres as the inversion slowly breaks down in the alpine. Light Southeast winds.Tuesday: Temperature inversion breaks down as cloud and light precipitation move in from the South. Freezing level at about 1000 metres.

Avalanche Summary

Size 1.0 - 2.0 loose wet "dirty" avalanches were reported from the Duffey Lake area. No other reports from the region.

Snowpack Summary

The surface snow is likely undergoing a melt-freeze cycle on all but high elevation shady aspects, while the entire snowpack may even be trending isothermal at lower elevations. On shady aspects expect to find faceted powder; however, in exposed areas winds have scoured windward slopes, left deep drifts on lee aspects, and and sculpted sastrugi. The record low snowpack is generally well settled and strong; however, a facet/crust combo from late November down approximately 100-120 cm at treeline and alpine elevations continues to give sudden results in snowpack tests. Facets and depth hoar at the base of the snowpack remain a concern on slopes with a shallow and variable snowpack in the Duffey Lake and Chilcotin areas.

Régions couvertes