Bulletin d’avalanche

Northwest Inland

Mar 29 – 30, 2017Avalanche Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

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

Periods of strong solar radiation combined with high daytime freezing levels may increase the chance of deep persistent avalanches.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Wind slabs continue to be a concern for human triggering. Watch for pockets of wind transported snow at higher elevations, and on slopes that are sheltered from the sun.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    A weak layer of facets and/or a crust that developed early in the winter lies near the bottom of the snowpack. Forecast strong solar radiation and high daytime freezing levels may combine to "wake-up" this deep persistent problem.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain on Thursday

Weather Forecast

Overnight: Mostly cloudy with a chance of flurries and light northwest winds. Freezing down to valley bottoms by morning. Thursday: A weak ridge of high pressure should bring scattered cloud with periods of strong solar radiation, and daytime freezing levels up to 1200 metres. Friday: Cloudy with 3-5 cm of new snow combined with strong southwest winds and daytime freezing levels up to 1300 metres. Saturday: Another 3-5 cm of new snow and strong southwest winds.

Avalanche Summary

No new avalanches reported.

Snowpack Summary

Light snow combined with moderate southwest winds has developed wind slabs in the alpine and in some exposed treeline locations. Periods of sun and high daytime freezing levels have developed crusts below treeline and on sun exposed terrain at all elevations. The snow may be moist or wet below treeline during the warmest part of the day. The deep persistent weak layer of facets and/or a crust that were buried early in the winter are still lingering near the bottom of the snowpack.

Régions couvertes