Boletín de aludes

Yukon

Feb 14 – 15, 2022Avalanche Canada
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Archivado · caducó 5 years ago

Peligro de aludes

Wed
Thu
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
Sin grado

Lo esencial

Lingering wind slabs may remain reactive to human triggers on lee features in the alpine.

Whumpfing, cracking, and hollow sounds are all signs of instability that should cause you to back off into lower angle or less wind-loaded terrain.

Problemas de aludes

  • Wind Slabs

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

    Lingering wind slabs may remain reactive on lee features in the alpine.

    Whumpfing, cracking, and hollow sounds are all signs of instability that should cause you to back off into lower angle or less wind-loaded terrain.

Confidence

High -

Weather Forecast

SUNDAY NIGHT: Partly cloudy / Light, west wind / Low of -13.

MONDAY: Mix of sun and cloud / Light, northwest wind / High of -9.

TUESDAY: Mostly cloudy / Strong, northwest wind / High of -5.

WEDNESDAY: Cloudy with flurries; 3-5 cm / Strong, west wind / High of -3.

Avalanche Summary

No new avalanches were reported on Saturday. 

On Friday, our field team reported significant cracking on features that had recently been loaded by the wind.

 Whumpfing, cracking, and hollow sounds are all signs of instability that should cause you to back off into lower angle or less wind-loaded terrain.

Snowpack Summary

10-15 cm of recent snow has been hammered by strong southwest winds. Expect wind-affected surfaces on all but the most sheltered north aspects. 

Wind slabs are likely present on lee features at all elevations and may remain reactive to human triggers.

This overlies a hard crust that extends up to at least 1200 m on solar aspects. Below this, the mid-pack is generally well-settled and strong in most areas.

Weak facets (sugary snow) exist at the base of the snowpack, especially in more shallow snowpack areas such as the Inland areas.

Terrain and Travel

  • Carefully evaluate steep lines for wind slabs.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

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