Bollettino valanghe

Purcells

Apr 23 – 24, 2016Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 10 years ago

Pericolo valanghe

Mon
Tue
Alta quota
Senza grado
Limite del bosco
Senza grado
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

You'll have to wait until Monday for clear weather as light rain is forecast for the weekend. Expect deteriorating snow stability (and ski quality).

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–5
    Use extra caution when traveling on corniced ridges. Despite the slight cooling trend, cornices will remain sensitive to human triggering.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–4
    Forecast rain will promote ongoing loose wet avalanche activity. Areas of greatest concern are steep gullies and faces at elevations below the new snow line.

  • Wet Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–6
    Destructive wet slab avalanches should still be on your radar, especially with forecast rain. Wet slabs may fail on layers in the mid snowpack, or at the ground.

Weather Forecast

Sunday: 5-10mm of precipitation / Light ridgetop winds / Freezing level at 2200m Monday: Mix of sun and cloud / Light ridgetop winds / Freezing level at 2000m Tuesday: Mix of sun and cloud / Light ridgetop winds / Freezing level at 2400m

Avalanche Summary

Most commercial operations have closed for the season, and data is becoming sparse. If you have any avalanche activity to report, please consider sharing through the Mountain Information Network.

Snowpack Summary

Monitoring the snow surface is very important during the spring. If the snow surface does not freeze overnight or if the crust is only a few cm thick, the effect of daytime heating, rain or solar radiation will weaken the snowpack much more quickly than it would if there is a well frozen thick crust. Deeply buried weak layers in the mid snowpack and near the ground still have the potential to wake up and become active with a rapid warm up. While unlikely, releases on these deeply buried weak layers would result in very large avalanches. Glide cracks are widespread, active, and best avoided. Cornices are large, fragile, and could trigger deep slab avalanches that run to valley bottoms. The snowpack in many areas has become isothermal, meaning the snowpack is 0 degrees Celsius throughout. An isothermal snowpack is more prone to full depth wet slab avalanches during the heat of the day.

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