Bulletin d’avalanche

Kootenay Boundary

Feb 16 – 17, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Utilize small-scale features to assess how the new snow is bonding, before progressing to larger terrain.

Problèmes avalancheux

  • Wind Slabs

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

    Expect newly formed windslab avalanches to be found just below ridge top and at the bottom of steep features.

  • Storm Slabs

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

    May be more reactive on solar aspects where the new snow sits on a thin sun crust or in lee areas.

Confidence

Moderate

Avalanche Summary

On Wednesday, near Nelson and east of Kelowna, numerous large (size 2) wind slab avalanches had been initiated utilizing explosives. Near the Nelson area, a large (size 2) skier-triggered avalanche on a southwest aspect occurred following a period of moderate north east winds.

A few wet loose avalanches were reported on Tuesday from slopes facing the sun.

Snowpack Summary

10 to 20 cm of recent snow combined with winds from all directions has transported this snow and formed wind slabs that have been reactive to skier triggering. 10 to 20 cm of recent storm snow sits on a layer of small surface hoar which may lurk in sheltered areas. In some places, the new snow and surface hoar sits on a thin sun crust.

A thick rain crust from early February is now buried 30 to 40 cm deep and seems well-bonded at lower elevations.

Crusts and facets in the mid and lower snowpack can still be found in isolated pockets.

Weather Summary

Thursday Night

Mostly clear skies. 10 to 20 km/h north ridgetop wind. Treeline temperature -16 °C.

Friday

Mostly clear skies. 10 to 20 km/h southeast ridgetop wind. Treeline temperature -3 °C.

Saturday

Mostly clear skies. 20 to 50 km/h southeast ridgetop wind. Treeline temperature -3°C.

Sunday

Clear skies becoming cloudy in the afternoon. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
  • Investigate the bond of the recent snow
  • Start with conservative lines and watch for clues of instability.

Régions couvertes