Boletín de aludes

Jasper

Jan 15 – 16, 2022
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Archivado · caducó 5 years ago

Peligro de aludes

Sun
Mon
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

Weak facets below new snow and wind slabs are making for dangerous avalanche conditions. Conservative terrain choices advised through the weekend.

Icefields Parkway and Maligne Lake road remain closed for maintenance - AB511 for up to date info.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2.5

    Wind slab development will continue with moderate to strong SW winds. Expect wind slabs to be reactive to a riders weight.

  • Persistent Slabs

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

    A persistent slabs sit over 2 different layers depending on elevation. Below 1950m, the persistent weak layer is the Dec 1 rain crust. Above 1950m, facets buried on Dec 26 are the primary concern.

  • Loose Dry

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

    Watch for overhead pillows or full ledges where loose snow will accumulate.

Avalanche Summary

Several large wind slabs, persistent slabs and loose dry avalanches initiated all asp and elev with explosive control on the Icefields Parkway and Maligne road on Thursday. Road clearing ongoing and will take time for both roads to be passable. Many avalanches picked up and entrained much of our faceted mid pack especially at tree line and below.

Confidence

Weather Forecast

Saturday: Mainly cloudy with isolated flurries. Temp High -5 C. Wind SW 20 gust 65 km/h. FZL valley bottom

Sunday: Scattered flurries up to 5cm. Temps: Low -9 C, High -6 C. Wind W 20 km/h. FZL valley bottom

Monday: Flurries up to 7cm. Temp: Low -13 C, High -3 C. Wind W 20 gust 65 km/h. Freezing level 1600m.

Snowpack Summary

New snow with strong SW are creating wind effect and building wind slabs on leeward slopes. These winds slabs are are not bonding well with the previously faceted surface. The mid snowpack is faceted with the December persistent weak layers buried 40-70cm. Basal facets and depth hoar can be found at the base of snowpack.

Regiones cubiertas