Boletín de aludes

Vancouver Island

Jan 31 – Feb 2, 2018VIAC
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Archivado · caducó 9 years ago

Peligro de aludes

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

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–1.5
  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely - Certain
    Tamaño
    1–2
  • Wet Slabs

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

Confidence

High - Weather models in agreement and good data for east and north. (limited obs for the west/Strathcona).

Travel & Terrain Advice

Avoid exposure to wind loaded slopes in the alpine and treeline on NE-NW aspects. Wind slabs will have a poor bond to the near surface crust. As the rain begins to fall avoid exposure to terrain traps such as cliffs, tree bands and depressions like streams. Also avoid travel in gullies that will funnel the potential wet slides. The crust from Sunday’s rain event has variable support to both skis and foot traffic and is very difficult to travel on. Frozen debris from wet slides and tree bombs also presents a navigation challenge. Move slow and carefully as these hazards now lurk under newly fallen fresh snow.

Avalanche Summary

No new avalanche activity reported during the past two days. Clear skies have allowed observations of the widespread wet loose and wet slab activity during Sunday’s rain event. As expected there are numerous paths that ran up to size 1 and a few up to size 2.

Snowpack Summary

A dusting of new snow over a nasty crust. A few isolated wind slabs near ridge line and on cross loaded features.

Snowpack Details

Surface: Variable support rain crust, buried under light amounts of new snow. Upper: Moist snow from Sunday's rain event. Mid: Preserved dry snow with a few smooth failures in tests. Lower: Well settled.

Past Weather

Cold temps have created a widespread rain crust that is now buried under light to moderate amounts of new snow. Moderate SW winds have created isolated wind slabs that have a poor bond to the crust below.

Weather Forecast

Moderate new snow giving way to our next rain event. Wednesday: 5-10 cm of new snow, temps -3 to -6, winds light to moderate SW-SE, freezing level 0-800 m. Thursday: 5-10 cm of new snow leading to 2-5 mm of rain, temps -5 rising to +3, winds light SW rising to moderate SE, freezing level 700 rising to 1150-1900 m. Friday: 2-10 mm of rain, temps +3 dropping to 0, winds light to strong from the SW, freezing level 2600 dropping to 1500 m.

Regiones cubiertas