Bulletin d’avalanche

Kootenay Boundary

Mar 2 – 3, 2026Avalanche Canada
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Archivé · expiré 7 months ago

Danger d’avalanche

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

Large, persistent slab avalanches triggered by riders and occurring naturally continue to be reported daily - many in steep treed areas.

Problèmes avalancheux

  • Wind Slabs

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

    Recent windslab formation has been extensive, and stubborn slabs could extend into openings below treeline.

  • Persistent Slabs

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

    Be aware of the potential for remote-triggering and large avalanches due to buried surface hoar, especially at treeline and below. Watch for wet avalanches with sun and daytime warming, these could trigger the weak layer below.

  • Loose Wet

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

    Direct sun and daytime warming may trigger wet avalanches.

Confidence

Moderate

  • We have higher uncertainty about treeline conditions due to persistent slabs.

Avalanche Summary

On Friday and Saturday, natural, remote, and rider-triggered avalanches up to size 3 were reported. This Friday MIN reports remote-triggering a large avalanche from 50 m away.

In the last week, large, persistent avalanches have been triggered or failed naturally almost daily; many occurring around steep openings in treed areas. See Feb 24 MIN and Feb 21 MIN

Snowpack Summary

Widespread wind effect has impacted 20 to 30 cm of recent snow, leaving a variety of pressed surfaces into open treeline areas. A sun crust covers steep solar slopes, and moist surfaces are expected with sun and daytime heating.

In the top 100 cm of the snowpack, there are multiple concerning weak layers of surface hoar and/or crusts/facets. The majority of recent persistent slab avalanches have been on well-preserved surface hoar in sheltered areas at treeline and below.

The mid and lower snowpack are well settled.

Weather Summary

Sunday Night

Clear skies. 20 km/h west ridgetop wind. Treeline temperature 0 °C.

Monday

Sunny. 30 km/h west ridgetop wind. Treeline temperature 1 °C.

Tuesday

Mix of sun and clouds. 2 to 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Wednesday

Mostly cloudy. 4 to 20 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • In times of uncertainty, conservative terrain choices are our best defense.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • Be alert to conditions that change with elevation and sun exposure.

Régions couvertes