Boletín de aludes

Yukon

Jan 15 – 18, 2020Avalanche Canada
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Archivado · caducó 7 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
Sin grado

Lo esencial

Cold temperatures and outflow (generally north) winds continue to blow. There is some uncertainty about the distribution and sensitivity of wind slabs. If you venture out in the frigid conditions it's best to seek out what little wind sheltered terrain you can find.

Problemas de aludes

  • Wind Slabs

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

    Strong outflow winds have stripped away snow in exposed terrain. Pockets of wind slab near ridge crest may still be sensitive to human triggering.

Confidence

Low - Uncertainty is due to the limited number of field observations.

Weather Forecast

Cold temperatures and continued winds generally out of the north are going to be with us through the forecast period.

WEDNESDAY NIGHT: Around -25 C, strong east wind, no significant precipitation.

THURSDAY: Sunny with cloudy periods, alpine temperature -29 C, moderate north wind, no significant precipitation.

FRIDAY: Sunny, alpine temperature -29, moderate to strong northeast wind, no significant precipitation.

SATURDAY: Sunny with cloudy periods, alpine temperature -26 C, light northeast wind, no significant precipitation.

Avalanche Summary

No recent avalanche observations. The brutally cold temperatures are likely tempering any avalanche activity.

Snowpack Summary

Strong northeast wind has prevailed since late last week, stripping away snow in exposed terrain and depositing it in lee terrain features. Isolated wind slabs may still be found.

Snow depths at White Pass average around 150 cm; deeper locations (higher terrain west of the highway) have as much as 200 cm. It's reasonable to expect a thin snowpack with sugary facets in the Wheaton Valley, although we don't yet have observations to confirm this.

Terrain and Travel

  • Be aware of highly variable recent wind loading patterns.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Watch for areas of hard wind slab on alpine features.

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