Bollettino valanghe

Purcells

Mar 16 – 17, 2024Avalanche Canada
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Archiviato · scaduto 3 years ago

Pericolo valanghe

Mon
Tue
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte

In sintesi

⚠️ Avoid All avalanche terrain ⚠️Soaring freezing levels and solar radiation will result in a widespread natural avalanche cycle on Sunday.

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Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    2–4

    A crust with weak facets overtop is down 80 to 150 cm. Very large natural and human triggered avalanches occurring on this layer are very likely on Sunday.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1–2.5

    If triggered loose wet avalanches may step down to deeper layers, resulting in very large avalanches.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    3–4

    A widespread weak layer exists at the bottom of the snowpack. Large triggers, such as falling cornices or smaller avalanches in motion may have the potential to trigger this deeply buried weak layer.

Confidence

High

Avalanche Summary

Numerous naturally triggered wet loose avalanches up to size 2.5 and persistent slab avalanches up to size 3 (very large) were reported on all aspects at treeline and above on Friday.

Very large, natural avalanches are expected to continue to occur on Sunday.

Snowpack Summary

High freezing levels overnight will result in no overnight re-freeze of the snow surface. As a result, the avalanche danger will rise rapidly throughout the day.

A widespread crust is buried roughly 80-120 cm deep. Weak faceted crystals and surface hoar above this crust are contributing to large avalanches across the province and continue to be the primary layer of concern here.

The basal snowpack is generally weak and faceted, with the potential to produce very large avalanches with the forecast of prolonged warming.

Weather Summary

Saturday Night

Clear skies. 10 km/h north ridgetop wind. Treeline temperature 7 °C. Freezing level 3000 m.

Sunday

Sunny. 10 km/h west ridgetop wind. Treeline temperature 8 °C. Freezing level 3000 m.

Monday

Sunny. 10 km/h west ridgetop wind. Treeline temperature 8 °C. Freezing level 3000 m.

Tuesday

Sunny. 10 km/h west ridgetop wind. Treeline temperature 6 °C. Freezing level 2700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid all avalanche terrain during periods of intense solar radiation.
  • Only the most simple non-avalanche terrain free of overhead hazard is appropriate at this time.
  • Be aware of the potential for large, deep avalanches to run full path or even longer.
  • The likelihood of deep persistent slab avalanches will increase with each day of warm weather.
  • Cornice failure may trigger large avalanches.

Regioni coperte