Bulletin d’avalanche

South Okanagan

Mar 5 – 6, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Look for signs of instability and assess for wind slabs. Small avalanches on the surface have the potential to step down to weak layers deeper in the snowpack.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Wind slabs may remain triggerable to riders. Assess for slabs in lee terrain features prior to committing.

  • Persistent Slabs

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

    A weak layer of facets may exist above a hard melt-freeze crust that formed in early February.

Confidence

Moderate

Avalanche Summary

Recent storm snow was reactive to explosive control work, producing avalanches up to size 1.5 east of Kelowna on Saturday.

Numerous large to very large natural and human-triggered persistent slab avalanches continue to be reported in neighboring regions.

Snowpack Summary

A variety of surfaces can be found including a dusting of new snow, sun crust on south aspects, and wind effect in the alpine.

A thick and hard widespread crust that formed in early February is buried roughly 40 to 70 cm deep. This crust may have a layer of facets above it. In neighboring regions, this layer has been producing many large and concerning avalanches over the past week.

The remaining snowpack below this crust is generally well-settled and strong.

Weather Summary

Monday Night

Mostly clear. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -12 °C.

Tuesday

Mix of sun and cloud. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -12 °C.

Wednesday

Sunny. 10 to 20 km/h west ridgetop wind. Treeline temperature -10 °C.

Thursday

Sunny. 10 to 20 km/h west ridgetop wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Remote triggering is a concern, watch out for adjacent and overhead slopes.

Régions couvertes