Boletín de aludes

Northwest Coastal

Dec 24, 2018Avalanche Canada
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Archivado · caducó 8 years ago

Peligro de aludes

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

Lo esencial

Wind slabs will likely be found at upper elevations and may be reactive to human triggering, especially in lee features. In any areas have received more than 30 cm of new snow in the past 24 hours, the hazard is likely "Considerable" in the alpine.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5
    Recent fresh snow and wind will likely be forming wind slabs at upper elevations.

Confidence

Moderate - Forecast snowfall amounts are uncertain.

Weather Forecast

SUNDAY NIGHT - Flurries, 5-10 cm / southwest to west winds, 30-60 km/h / alpine low temperature near -5°c. MONDAY - Flurries, 5-10 cm / west winds, 20-40 km/h / alpine high temperature near -5°c. TUESDAY - Flurries, 5-10 cm / light northwest winds / alpine high temperature near -5°c, low temperature near -7°c. WEDNESDAY - Flurries, 5-10 cm / southwest winds 20-30 km/h / alpine high temperature near -3°c, low temperature near -5°c.

Avalanche Summary

No new avalanches were reported in the region on Saturday. Several small natural and explosives triggered avalanches (size 1-1.5) were reported in the region on Friday.

Snowpack Summary

10-30 cm of new snow sits on a melt-freeze crust to approximately 1000 m. Above 1000 m this new snow is just adding to the 150+ cm of snow that has fallen over the past week. Strong winds have likely formed wind slabs at upper elevations, especially in lee features. Expect to find more reactive slabs in wind loaded areas, and especially in places that received high snowfall amounts over the weekend. 120-200 cm of snow sits on a weak layer that was a concern when the first waves of the storm hit the coast, but the strength of this layer has generally improved over the past week. This layer consists of surface hoar (feathery crystals), facets (sugary snow), and crusts that formed during the dry spell in early December. The surface hoar is most prevalent and has most recently been reactive between 1100-1300 m in more northern portions of the region, and is something to keep in mind if you plan to travel to areas like Ningunsaw. Deeper in the snowpack, there are several crusts, including an early season crust with facets near the bottom of the snowpack.

Regiones cubiertas