Bulletin d’avalanche

South Coast Inland

Mar 2, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

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

Reactive wind slabs remain the primary concern at upper elevations. These are easily triggered by the weight of a person.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Strong northeast winds have formed reactive wind slabs on south-southwesterly slopes and behind terrain features. Pockets of older wind slabs can still be found on all aspects. Loose dry sluffing may occur from steeper terrain features.

Confidence

High - The weather pattern is stable

Weather Forecast

Heading into March it feels more like January. The strengthening ridge will bring us another fairly long stretch of cold, dry and clear weather.SATURDAY/ SUNDAY/ MONDAY: A mix of sun and cloud with alpine temperatures near -15. Moderate ridgetop wind from the northeast through the forecast period.

Avalanche Summary

On Thursday, numerous wind slabs up to size 1.5 remained reactive to human triggers on all aspects at treeline and in the alpine. These wind slabs failed on older firm surfaces and facets approximately 20-30 cm down.

Snowpack Summary

10-20 cm of new snow now sits above a plethora of old surfaces including firm wind affected surfaces, sun crusts on steep solar aspects, surface hoar and faceted crystals in sheltered areas. This recent low-density snow may sluff easily from steeper terrain features. Strong northeast wind from earlier this week formed pockets of wind slab in exposed terrain which remain reactive to human triggers especially on southerly aspects. Wind slabs have been failing on a weak faceted layer down 20-50 cm but we're uncertain of how widespread this layer is. The lower snowpack is generally well-settled.

Régions couvertes