Boletín de aludes

South Coast Inland

Mar 8, 2018Avalanche Canada
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Archivado · caducó 9 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil

Lo esencial

Danger will increase late on Thursday and into Friday as new snow accumulates.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    Fresh wind slabs will build throughout the day at higher elevations.
  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2.5
    Cornices are inherently unstable, unpredictable, and demand respect. New snow and warming will likely make cornices extra brittle.

Confidence

Moderate - Forecast snowfall amounts are uncertain on Thursday

Weather Forecast

THURSDAY: Flurries increasing throughout the day with up to 5 cm in the north and up to 10 cm in the south, moderate south wind, freezing level rising to around 1500 m.FRIDAY: Another 10-20 cm of snow and then clearing in the afternoon, light wind, freezing level dropping to around 1000 m.SATURDAY: Mostly sunny with freezing level rising to around 1600 m.

Avalanche Summary

Numerous loose wet avalanches were observed in steep south-facing terrain on Wednesday and Tuesday. Most were small (size 1), but a few in the Coquihalla reached size 2.Last weekend, a few size 2 natural slab avalanches were reported in the northern part of the region on a range of aspects around 2000 m.

Snowpack Summary

New snow will accumulate on Thursday and Friday and form extra deep deposits in wind loaded terrain. The new snow is falling on a sun crust on steep south-facing slopes, cold dry snow on polar aspects, and wind affected snow at upper elevations.In northern parts of the region the mid-February weak layer is about 40 cm below the surface and has been reactive in some snowpack tests. The layer is composed of sugary facets, a sun crust on solar aspects, and surface hoar that is present at and below treeline. No recent avalanche activity has been reported on these layers.The snowpack is well settled in southern parts of the region (e.g. Coquihalla and Manning Park).Variable winds in the past month have created cornices on many alpine ridgelines. They will become touchier as they grow in size, as temperatures rise, and as the strong late-winter sun shines down upon them on clear days.

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