Boletín de aludes

Jasper

Jan 24 – 25, 2021
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Archivado · caducó 6 years ago

Peligro de aludes

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

Lo esencial

Good quality turns can be found in sheltered areas below tree line. Despite the Moderate rating in the alpine, human triggering remains possible. Assess conditions if encountering avalanche paths, start zones, terrain traps, and overhead hazards.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–2.5

    Previous strong to extreme Southwesterly winds have resulted in wind slab formation in open terrain features at all elevations. Be wary of where firm slabs have built over shallow areas, on unsupported slopes, and on steep solar aspects.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2.5

    Use caution around thin to thick areas as potential trigger locations. Keep an eye out for buried surface hoar lurking in isolated sheltered locations below treeline.

Weather Forecast

A high pressure system will continue the next 4 days to provide mostly clear skies, light South to Southwest winds, no new snow, frigid overnight temperatures rising to -15 to -10C by late afternoon. 

Snowpack Summary

Frigid temperatures is creating surface facets. Previous strong to extreme winds have stripped snow from all exposed terrain creating a lot of hard wind slabs and wind affected snow in open terrain below treeline to the alpine. The midpack is supportive. Decomposing surface hoar is found down 40cm to 80cm in isolated sheltered locations.

Avalanche Summary

Saturday's Icefield patrol observed only a couple of avalanches 48-72 hours old. One windslab on the slopes across from Wilcox campground on the West side of the highway and two size 2's thin windslabs on Athabasca glacier triggered by a piece of falling ice. Nothing more recent noted. 

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Confidence

Due to the number of field observations

Regiones cubiertas