Boletín de aludes

Glacier

Apr 22 – 23, 2023Avalanche Canada
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Archivado · caducó 3 years ago

Peligro de aludes

Mon
Tue
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
Sin grado

Lo esencial

A spring storm will bring snow to higher elevations and rain to lower elevations.

If you decide to trudge through the rain and sloppy snow to reach white-out conditions in the alpine, evaluate changing conditions as you gain elevation or change aspects.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–3

    Up to 60cm of settled snow covers a series of crusts combined with surface hoar/facets in some locations. Loose wet avalanches in motion have the potential to step down to these layers, creating large avalanches.

  • Storm Slabs

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

    10-15cm of snow will fall at higher elevations and will be deeper in wind loaded areas. On solar aspects it will fall onto a crust and may be quite reactive until it has time to bond. Evaluate changing conditions if you gain elevation or change aspects.

  • Loose Wet

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

    Lower elevations will see 10mm of rain, as the freezing level rises up to 2000m. The snowpack below tree line will lose strength and wet loose avalanches will become likely in steep terrain.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.
  • If triggered loose wet avalanches may step down to deeper layers resulting in larger avalanches.

Confidence

Moderate

Avalanche Summary

Expect avalanche activity to increase on Sunday as lower elevations get saturated by rain and higher elevations receive 10-15cm of snow and moderate winds.

No new avalanches were observed or reported for the last two days.

Snowpack Summary

Below treeline, the snowpack is a series of supportive crusts, which break down with daytime warming.

At treeline and in the alpine, North aspects still hold dry snow. On solar aspects, a breakable crust overlies a series of buried crusts, which may provide a failure plane for slab avalanches as temps rise.

The Nov 17 basal weakness can still be found in many locations 20-40cm thick, above the ground.

Weather Summary

A storm system slides into the region Saturday evening bringing 10-15cm of snow at higher elevations and rain below tree line. Winds will be 20-40km/hr from the SW with a freezing level of 2000m.

Another 5cm on Monday with light winds.

Regiones cubiertas