Boletín de aludes

Vancouver Island

Feb 20 – 21, 2025Avalanche Canada
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Archivado · caducó 2 years ago

Peligro de aludes

Sat
Sun
Alta montaña
4 · Fuerte
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

While this stormy weather pattern feels familiar, an unfamiliar weak layer still exist deeper in the snowpack. Smaller avalanches may step down to deeper instabilities.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1.5–2.5

    A combination of buried surface hoar, facets, and old crust will reactivate with the addition of new snow.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely
    Tamaño
    1–2

    New snow will form reactive storm slabs, continued high winds throughout the storm may create much deeper slabs in lee areas.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely
    Tamaño
    1–1.5

    Warming temperatures combined with precipitation will increase likelihood of wet loose avalanches.

Confidence

Moderate

Avalanche Summary

There were a few size 1 to 1.5 slab avalanches reported over the weekend. These were running southwest through north aspects at treeline and in the alpine. There were also some reports of whumpfing and cracking in the Mt Cokely area.

If you are heading into the backcountry, consider posting a MIN.

Snowpack Summary

New snow falls on old wind-affected snow, facets, surface hoar, or a melt freeze crust. The bond of the new snow to the underlying layers is unknown.

At upper elevations, wind has redistributed storm snow into fresh wind slabs in lee terrain.

A widespread crust, sometimes accompanied by a thin layer of weak facets, is buried 30 to 70 cm beneath predominantly low-density snow.

The mid and lower snowpack contains no other layers of concern.

Weather Summary

Wednesday Night

Cloudy with 5 to 10 mm of mixed precipitation. 30 to 50 km/h west ridgetop wind. Freezing level 1200 m

Thursday

Cloudy with 5 to 10 mm of mixed precipitation. 30 to 50 km/h west ridgetop wind. Freezing level 1200 m.

Friday

Cloudy with 15 to 35 mm of mixed precipitation. 70 to 90 km/h southwest ridgetop wind. Freezing level 1500 m.

Saturday

Cloudy with 10 to 60 mm of mixed precipitation. 50 to 90 km/h south ridgetop wind. Freezing level rising to 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Use small, low consequence slopes to test the bond of the new snow.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

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