Bulletin d’avalanche

Sea To Sky

Dec 11 – 12, 2011Avalanche Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Tue
Wed
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Problèmes avalancheux

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2–5
    The likelihood of triggering a large avalanche is low, but it still makes sense to keep the deep weaknesses on your radar. The greatest concern is on steep, unsupported slopes with variable snowpack depths above 1900m.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain on Wednesday

Weather Forecast

Mostly clear skies and light northerly winds are forecast for monday.Trace amounts of snow are expected on tuesday with light to moderate westerly winds.Moderate snowfall will arrive on wednesday with moderate westerly winds.Freezing levels for the forecast period are expected to stay at valley bottom.

Avalanche Summary

There have been no recent avalanches reported.

Snowpack Summary

At the base of the snowpack mixed forms (rounding facets/rounding depth hoar) with an associated crust are prevalent, and have been especially problematic where it is overlying summer firn. Above that, and down 1-2m, are two more crusts combined with more mixed forms and surface hoar. The overlying snow has recently settled and stiffened and the weak interfaces have also gained strength. The snow surface is wind hammered in wind-exposed areas, crusty on sun-exposed slopes, and faceted powder with large surface hoar on shady sheltered slopes. A thick rain crust is down 20-40cm and extends up to treeline elevations.

Régions couvertes