Boletín de aludes

Jasper

Jan 30 – 31, 2019Parks Canada
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Archivado · caducó 8 years ago

Peligro de aludes

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

Use caution in crossloaded features. A  windslab might step down to deeper weaknesses. 

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    New snow on Sunday arrived with Strong winds (ranging from SW to N) creating windslabs over a variety of surfaces, including suncrust, surface hoar, and wind pressed areas. While natural activity has tapered, human triggering remains possible.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1.5–3.5
    A natural avalanche Monday on this layer shows that only minor changes may wake this generally dormant dragon. Triggering is most likely in thin areas, with variable snowpack depth. Use terrain choice and safe practices to minimize consequences.

Weather Forecast

Wednesday will be cloudy with sunny periods and isolated flurries. Treeline high temperature of -5C, with light NW winds. Thursday-Friday: Temperatures stay steady around -5, with cloudy skies and flurries. Winds will be light to moderate from the SW A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

5-10cm of snowfall on Sunday with SW - NW winds created wind slabs in lee and cross-loaded terrain. Surfaces became moist on solar slopes at treeline Monday. A layer of weak surface hoar is now buried 10-15cm deep. Below, a strong mid-pack sits over depth-hoar in the lower third of the snowpack (giving sudden results in snowpack testing Saturday).

Avalanche Summary

A natural Size 3 Deep Persistent slab was observed Monday on a steep (35+ degrees) Alpine South-West facing slope. Triggered by a smaller windslab, it stepped down to depth hoar and the ground. Several windslabs to Size 2 were also observed (Alpine S and E aspects). Help forecast - share observations HERE, on the Mountain Information Network!

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Friday

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