Bulletin d’avalanche

Sea To Sky

Dec 10 – 11, 2017Avalanche Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Tue
Wed
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Shady slopes offer the best snow, but watch out for wind slabs that may have formed at higher elevations.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Increased winds from the south may have produced wind slabs, particularly behind ridges in alpine terrain. Be cautious of firm snow when entering lee features.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Warm air temperatures and clear skies have produced spring-like conditions on steep solar aspects. Loose wet avalanches may begin small but can grow and push you into dangerous terrain.

Confidence

High - The weather pattern is stable

Weather Forecast

MONDAY: Clear skies, light to moderate southwesterly winds, freezing level around 3700 m with inversion conditions.TUESDAY: Partly cloudy, light to moderate southwesterly winds, freezing level around 2300 m with inversion conditions.WEDNESDAY: Mostly clear skies, light southwesterly winds, freezing level rising to 3400 m with inversion conditions.

Avalanche Summary

A small natural wind slab avalanche was noted on Saturday in steep alpine terrain on a northerly aspect.  No new avalanches were observed on Thursday or Friday.  Numerous small to large loose wet avalanches up to size 2 were observed on solar aspects on Wednesday.

Snowpack Summary

Warm air temperatures and clear skies have created surface crusts on south-facing slopes at higher elevations. The crusts may break down over the day with sunny conditions.  Moderate wind speeds from the south may have produced localized wind slabs on northerly lee features.  Surface hoar up to 10 mm and near-surface faceting have been noted in shady locations.  The snow from last week is settling and generally bonding well to the late-November rain crusts.  Cornices may be weakening with the continuing warm air temperatures.

Régions couvertes