Bulletin d’avalanche

Kootenay Boundary

Mar 31 – Apr 1, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Surface conditions and recent precipitation amounts are variable. Verify conditions as you travel.

Back off steep slopes if you find moist surface snow or no supportive crust.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2.5–3.5

    Several persistent weak layers exist in the upper meter of the snowpack. Where these layers remain intact and there is no thick melt-freeze crust above human-triggering remains possible.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Expected precipitation amounts are highly variable. If 15 cm of new snow accumulates new, small storm slabs could be found.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Pulses of new snow and fluctuating freezing levels will see wet loose activity continue. Back off steep slopes where moist surfaces are found.

    Dry loose avalanches are also possible where recent snow hasn't formed a slab or become moist .

Confidence

Moderate

Avalanche Summary

Small wet loose avalanches continue to be triggered by skiers in steep terrain. Some small storm slab avalanches have also been reported on high north facing terrain where dry snow still remains.

Snowpack Summary

The upper  snowpack is highly variable. A crust exists on or near the surface on all aspects below treeline and on all sun exposed slopes.  On north aspects, Up to 15 cm of snow has buried a melt-freeze crust from late March that increases in thickness  as you gain elevation. Below these crusts, the upper snowpack is moist.

Several week layers from early March, mid February and late January can be found in the mid and lower snowpack.

Weather Summary

Precipitation amounts over the next 24hrs could be highly variable due to convection.

Monday Night

Cloudy with 0 to 10 cm of snow. 10 to 25 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Tuesday

Cloudy with 1 to 5 cm of snow. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Wednesday

Mostly cloudy with trace amounts of snow. 10 to 20 km/h west ridgetop wind.  Treeline temperature -2 °C.

Thursday

Mostly cloudy with up to 10 cm of snow. 10 to 20 km/h west ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Make observations and continually assess conditions as you travel.

Régions couvertes