Boletín de aludes

North Columbia

Apr 24 – 25, 2022Avalanche Canada
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Archivado · caducó 4 years ago

Peligro de aludes

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

Carefully assess the wind slab hazard as you gain elevation. New wind slabs could form throughout the day.

Problemas de aludes

  • Wind Slabs

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

    New wind slabs could form in the alpine.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3

    Cornices may be weak and reactive to human triggers. Give them a wide berth when travelling on ridges. They are a significant hazard alone and may produce large slab avalanches as they fall onto the slope below. Cornice falls are more likely when the weather is sunny, warm, or windy.

Confidence

Moderate - The snowpack structure is generally well understood.

Weather Forecast

Sunday night: no new snow expected. Moderate south wind and freezing level falling to 1300 m.

Monday: Mostly cloudy with up to 5 cm of new snow expected. Freezing level around 2100 m. Moderate south wind.

Tuesday: Cloudy with 5 to 15 cm of new snow expected. Light to moderate variable winds and freezing levels around 1800 m.

Wednesday: Stormy with 5 to 10 cm of new snow expected with moderate southwest winds. Freezing level around 1700 m.

Avalanche Summary

Natural wet loose avalanches up to size two have been observed on all aspects and elevations except high north facing terrain over the past few days. We suspect that small wet loose avalanches will continue to be observed due to high freezing levels.

Snowpack Summary

Dry snow and pockets of wind slab can still be found on high north facing terrain. The upper snowpack contains several crusts that extend to mountain tops on solar aspects. Moist snow will likely be observed at treeline and belowterrain.

Cornices are very large and exposure to slopes beneath them should be minimized, especially if the weather is sunny, warm, or windy. The snowpack deteriorates rapidly at lower elevations.

Terrain and Travel

  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Carefully evaluate steep lines for wind slabs.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

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