Boletín de aludes

South Rockies

Mar 27 – 28, 2015Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

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

Warm temperatures and sunshine are the main drivers of avalanche hazard at the moment. Minimize your exposure to large slopes if the snowpack is becoming moist or wet.

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–3
    Expect loose wet slides on steep sun-exposed slopes during the day. These loose wet avalanches could gain considerable mass. 

  • Wet Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    Continued warm temperatures and potential periods of sunshine could trigger wet slab avalanches, which may move slow but can run surprisingly far.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    3–5
    Continued warming and solar radiation could make deeper persistent weaknesses more susceptible to triggering, especially and sun-exposed and thinly snow-covered slopes.

Confidence

Poor - Due to the number of field observations

Weather Forecast

Saturday: Freezing level hovering near 2000m. Strong W winds at treeline, strong to extreme W winds at ridgetop. Cloud cover decreasing throughout the day. No significant precipitation expected. Sunday: Freezing level staying near 2100m. Strong W winds at treeline, strong to extreme W winds at ridgetop. Partly cloudy skies. No significant precipitation expected.Monday: Freezing level starting near 2000m, rising to 2500m in the afternoon. Moderate SW winds at treeline. Strong W/SW winds at ridgetop. Mostly clear skies. No significant precipitation expected.

Avalanche Summary

No recent observations. In the neighboring Lizard Range Thursday was filled with natural loose wet activity to size 1.5 between 1700m and 2100m on N/NE faces. One natural size 2 wet slab was also recorded on an unknown aspect. On Friday our field team reported continued widespread loose wet avalanches and wet slabs to size 2 that were entraining significant mass as they moved downhill.

Snowpack Summary

Ongoing warm temperatures are helping to rapidly settle the snowpack at and below treeline. Ongoing SW winds have likely left lingering wind slabs on north through east facing features. The mid-March rain crust is down 30-60cm and has shown a good bond with snow above. Old persistent weak layers are still intact in the mid and lower snowpack. There is potential for these layers to wake up depending on how much rain and how warm it gets. Recent cornice growth has been reported and these cornices may become fragile with warming.

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