Boletín de aludes

Blue River

Jan 24 – 25, 2024Avalanche Canada
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Archivado · caducó 3 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Be cautious in areas where the surface snow feels heavy and cohesive.

Storm slabs are resting on a layer of facets and may be slow to bond. Reactivity may persist longer than usual.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3.5

    Two weak layers of surface hoar and facets exist deeper in the snowpack.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    New storm slabs have been building with continued snow and warm weather. They are resting on a weak layer of facets and in places surface hoar. This could mean they will be more reactive and slower to bond.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3.5

    Basal facets remain a concern in steep, rocky alpine features with thin-to-thick snowpack transitions.

Confidence

No Rating

Avalanche Summary

On Monday, a few natural, rider and remotely triggered avalanches were reported from size 1-2. They were all storm slabs and failed on a facet layer just below the most recent storm snow.

See one of the MIN reports here.

A natural storm slab cycle was also reported on Sunday up to size 2, on all aspects and elevations. All of them also failed on a weak layer of facets.

Snowpack Summary

20 to 30 cm of surface snow is now resting on a variety of old snow surfaces including faceted snow, surface hoar and firm wind slabs in open terrain at treeline and above.

Down 60 to 80 cm a crust, facet, and/or surface hoar layer exists.

130+ cm down another surface hoar layer exists that was buried in early December. This seems to be of most concern above 2000 m where a robust crust doesn't exist above it, or in shallow snowpack areas.

Weather Summary

Tuesday Night

Cloudy with up to 3 cm of snow, southwest alpine wind 10-40 km/h, treeline temperature around -2 °C.

Wednesday

Cloudy with flurries, southwest alpine wind 20-50 km/h, treeline temperature around -1 °C, freezing level 1400 m.

Thursday

Cloudy with up to 10 cm of snow, southwest alpine wind 20-40 km/h, treeline temperature around -1 °C, freezing level 1400 m.

Friday

Cloudy with flurries, south alpine wind 10-50 km/h, treeline temperature around -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.
  • Potential for wide propagation exists, fresh slabs may rest on surface hoar, facets and/or crust.

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