Bulletin d’avalanche

South Coast

Feb 12 – 13, 2015Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Spring-like conditions persist across the South Coast.  Avalanche hazard is closely linked to warming, rain, and/or sun especially at higher elevations in the North of the region where it may have been possible to find cooler snow until recently.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–4
    Isolated pockets of wind slab can be found at upper elevations although these are likely to be gaining strength with the warm conditions.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    As the freezing level continues to rise loose wet avalanches could become problematic at higher elevations where precipitation falls as rain. Brief periods of sun will also increase the likelihood of avalanche activity on steep south facing slopes.

Confidence

Fair - Timing or intensity of solar radiation is uncertain

Weather Forecast

Freezing levels will remain high until a cold front brings moderate precipitation and lowering freezing levels to the coast.   A week ridge is expected to build over the province by Sunday causing a return to cooler and drier conditions.  The freezing level on Friday is forecast to peak at 3000m with showers starting in the afternoon and light to moderate winds from the southwest.  Showers will continue into Saturday as the freezing level falls to 2000m and winds become more westerly.  Northwesterly winds on Sunday will mean continued cooling with isolated showers and/or flurries above 1500m expected.

Avalanche Summary

No new avalanche have been reported recently although I expect wind slabs could be reactive in the high alpine and loose wet avalanche are probably still popping off bellow the freezing level and on steep alpine slopes that see brief periods of sun.

Snowpack Summary

5-10 cm of new snow has fallen since the weekend in the high alpine where moderate to strong southwest winds have formed isolate pockets of windslabs.  In the south of the region around 40-50 cm of snow sits above the supportive rain crust from early February. Further north the crust is buried closer to 1m down.   The snow is moist below 2000m and a breakable melt-freeze curst might be encountered in between 1400m to 1900m.  The snow is reported to be saturated at lower elevations and reports suggest that stumps and creeks are exposed closer to valley bottom.

Régions couvertes