Boletín de aludes

Purcells

Mar 26 – 27, 2021Avalanche Canada
Ver en el mapa
Archivado · caducó 6 years ago

Peligro de aludes

Sun
Mon
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
Abrir el mapa completo

Lo esencial

Watch for wind slabs and cornices in steep alpine terrain, and be careful on sunny slopes when the surface is moist or wet.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–1.5

    Steady wind from the southwest and northwest has left some unstable slabs on steep alpine slopes.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    2–2.5

    Where cornices exist they pose a threat both from the potential to collapse under your feet (or machine) and from the potential to send large chunks of snow far down a slope.

Confidence

High - Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

FRIDAY NIGHT: Partly cloudy, 40 km/h northwest wind, treeline temperatures around -4 C.

SATURDAY: Mix of sun and cloud, 30-50 km/h southwest wind, freezing level climbing to at least 1800 m, treeline temperatures around -2 C.

SUNDAY: Scattered flurries with 5-15 cm of snow, 40-50 km/h southwest wind, freezing level climbing to 1800 m, treeline temperatures around -2 C.

MONDAY: Another 5-10 cm of snow by the morning then cloudy with isolated flurries during the day, 20 km/h northwest wind, treeline temperatures drop to -8 C.

Avalanche Summary

Recent avalanche activity has been limited to small (size 1-1.5) wind slab avalanches, dry loose sluffs, and cornice falls. These have occurred on a range of aspects, and will continue to be possible on wind-loaded or sun-exposed slopes.

Snowpack Summary

The surface consists of 10-20 cm of dry snow on shady sheltered slopes and moist and crusty surfaces on sun exposed slopes. Gusty westerly winds have formed some isolated wind slabs in lee features. A widespread crust layer from the mid-March warm spell can be found 20-40 cm deep, and small surface hoar has been observed at this depth on some isolated north-facing slopes. Reports suggest the snow is generally well bonded to these layers. Deeper layers are strong and have been unreactive over the past few weeks.

Terrain and Travel

  • Be alert to conditions that change with elevation, aspect and exposure to wind.
  • Carefully evaluate steep lines for wind slabs.
  • Minimize your exposure time below cornices.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.

Regiones cubiertas