Boletín de aludes

Sea To Sky

Apr 15 – 16, 2017Avalanche Canada
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Archivado · caducó 9 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

The next big change is on Sunday: Sunny, warm weather will be driving avalanche problems.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    Shifting wind directions have created fresh wind slabs on a variety of aspects.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3
    Where they exist, cornices pose a significant hazard and should be avoided, especially when the sun comes out in full force.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    Warm temperatures and sunshine will make the snow heavy, wet and cohesionless on Sunday. Even small slides can have serious consequences.

Confidence

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

Weather Forecast

The clouds will clear out Saturday evening, giving way to pleasant weather on Easter Sunday. Back to wet spring weather on Monday.SUNDAY: Sunshine in the morning, clouding over in the afternoon. Freezing level rising to 1800 m, highs near +3. Winds light southerly.MONDAY: Rain (5-10mm) up to 1600m, with wet snow higher up. Winds 20-30 km/h from the south.TUESDAY: Wet snow or rain. Freezing level around 1500 m. Winds moderate southwesterly.

Avalanche Summary

On Thursday, explosives control work was able to trigger a Size 2 storm slab on a northwest facing aspect in the alpine near Whistler. Skiers were also able to trigger several Size 1 soft slabs in steep leeward alpine terrain. Expect avalanche activity to increase with the warm weather on Sunday.

Snowpack Summary

We've had 20-30 cm of settling storm snow above 1500m. Winds were moderate to strong from a variety of directions and have created fresh wind slabs in exposed terrain at treeline and above. On Sunday the sun will come out in full force - it's a good time to remember that cornices remain large in some areas and could trigger large avalanches when they fail (especially when warmed by the sun). The fatal accident near Lions Bay a week ago illustrates the danger of cornices breaking off, and the large avalanches they can trigger.

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