Bulletin d’avalanche

South Okanagan

Mar 18 – 19, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Wed
Thu
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
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Points saillants

⚠️ Avoid All avalanche terrain ⚠️Very warm temperatures and strong solar radiation will likely produce very large natural and human triggered avalanches.

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Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    Cornices are large, looming and will likely trigger very large persistent slab avalanches when they fail.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely
    Taille
    2–3

    A crust with weak facets overtop is down 40 to 130 cm. Large natural and human triggered avalanches occurring on this layer are very likely on Tuesday.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely
    Taille
    1–2.5

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

Confidence

High

Avalanche Summary

One naturally triggered size 2 persistent slab avalanche on a north aspect at treeline and a natural size 2 wet loose avalanche on a south aspect in the alpine were reported on Sunday.

A skier triggered large persistent slab avalanche on a northeast aspect in the alpine was reported on Saturday. See MIN.

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 - 130 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.

Weather Summary

Monday Night

Clear skies. 10 to 20 km/h west ridgetop wind. Treeline temperature 4 °C. Freezing level 3000 m.

Tuesday

Sunny. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 9 °C. Freezing level 2800 m.

Wednesday

Mix of sun and cloud. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 6 °C. Freezing level 2400 m.

Thursday

Mix of sun and cloud. 20 to 30 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1900 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.
  • If triggered loose wet avalanches may step down to deeper layers resulting in larger avalanches.
  • Cornice failure may trigger large avalanches.

Régions couvertes