Bollettino valanghe

South Okanagan

Mar 4 – 5, 2024Avalanche Canada
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Archiviato · scaduto 3 years ago

Pericolo valanghe

Wed
Thu
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

Wind slabs are the main concern. Look for signs of instability and assess for wind slab as you move through terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

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

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–2.5

    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. Some have run full path to valley bottoms. Many of the human triggered avalanches have been reported as remotely triggered (from a distance). This speaks to the sensitivity of the persistent slab problem.

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

Weather Summary

Sunday night

Up to 5 cm of new snow. 10 to 30 km/h south alpine wind.  Treeline temperature -6°C.

Monday

A mix of sun and cloud with trace amounts of new snow. 20 to 30 km/h southwest alpine wind. Treeline temperature  -8°C.

Tuesday

Mostly sunny. 10 to 30 km/h northwest alpine wind. Treeline temperature -6°C.

Wednesday

Sunny. <20 km/h northwest alpine wind. Treeline temperature -3°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.

Regioni coperte