Boletín de aludes

Purcells

Mar 29 – 30, 2016Avalanche Canada
Ver en el mapa
Archivado · caducó 11 years ago

Peligro de aludes

Thu
Fri
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
Abrir el mapa completo

Lo esencial

Special Public Avalanche Warning for this region. Forecast very warm temperatures, high freezing levels, and strong solar radiation will increase the avalanche danger.

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    3–6
    Cornices may release naturally during periods of strong solar radiation and very warm daytime temperatures.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    3–6
    Intense spring sun and rising temperatures could reactivate buried persistent weaknesses in the upper snowpack.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–3
    High daytime temperatures and strong solar radiation may result in natural loose wet avalanches at all elevations. Avoid sun exposed slopes if the snow is moist or wet.

Confidence

High

Weather Forecast

Clear skies and very warm daytime temperatures are forecast for the remainder of the week; freezing levels should reach at least 2500 metres. Winds are expected to be light from the west or northwest. There should be some radiative cooling overnight that may develop surface crusts, but the warm air mass may break these crusts down very early in the day.

Avalanche Summary

Some natural cornice falls were reported on Monday up to size 2.0. I suspect that avalanche activity will increase as the temperatures and freezing levels rise over the next few days.

Snowpack Summary

Forecast warming and strong solar is expected to result in loose wet avalanches on sun exposed aspects at all elevations. This warming trend may start to affect deeper snowpack layers each day. Surface crusts may break down early, and persistent weak layers may fail if the warming reaches their fragile structure. The late February surface hoar/crust layer is down 40-90 cm. This layer may continue to react to human triggers during periods of strong solar radiation and high daytime temperatures. Loose wet avalanches in motion, or cornice falls may step down to deeply buried weak layers. Cornices continue to be described as large and fragile, and may fail with forecast warming and strong sunshine this week. Conservative terrain without overhead hazard is a good strategy for avoiding the persistent slab problem.

Regiones cubiertas