Bollettino valanghe

Purcells

Mar 17 – 18, 2024Avalanche Canada
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Archiviato · scaduto 3 years ago

Pericolo valanghe

Tue
Wed
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 likely continue to produce very large naturally triggered avalanches.

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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 40 to 110 cm. Very large natural and human triggered avalanches occurring on this layer are very likely on Monday.

  • 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 3.5 (very large) were reported on all aspects and elevations on Saturday.

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

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, hard crust down 40 - 110 cm with weak facets above continues to be the primary layer of concern for natural and human triggering of very large persistent slab avalanches.

Cornices have become large and looming, and are more likely to fail during periods of warming.

The bottom of the snowpack is generally weak and faceted, with the potential to produce very large avalanches. The most likely areas to trigger this deeply buried weak layer are steep, rocky areas in the alpine with a shallow or thin to thick snowpack.

Weather Summary

Sunday Night

Clear skies. 10 to 20 km/h west ridgetop wind. Treeline temperature 3 °C. Freezing level 2900 m.

Monday

Sunny. 10 to 20 km/h west ridgetop wind. Treeline temperature 8 °C. Freezing level 2900 m.

Tuesday

Mix of sun and cloud. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 5 °C. Freezing level 2300 m.

Wednesday

Mix of sun and cloud. 30 to 40 km/h southwest ridgetop wind. Treeline temperature 4 °C. Freezing level 2200 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