Lawinenlagebericht

Kootenay Boundary

Feb 26 – 27, 2026Avalanche Canada
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Archiviert · abgelaufen 7 months ago

Lawinengefahr

Sat
Sun
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
3 · Erheblich
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Kernpunkte

Wind slab formation has been extensive and could extend into openings below treeline.

Persistent slabs sitting on a weak layer of surface hoar remain possible to human trigger.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–3

    Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3

    Be aware of the potential for remote triggering and large avalanches due to buried surface hoar, especially at treeline and below.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

On Tuesday, several naturally triggered wind slabs up to size 3 were reported on north and east aspects at treeline and above.

Numerous rider triggered, large persistent slabs have been reported on all aspects and elevations over the past four days.

On Saturday, a rider triggered a large (size 2.5) persistent slab avalanche near Whitewater. It occurred on a northeast aspect at treeline. See MIN for details.

Snowpack Summary

Up to 20 cm of recent snow accompanied by strong southwest wind has formed deeper deposits on north and east aspects. In sheltered terrain it will overlie a layer of surface hoar or a sun crust. The snow surface is expected to become moist on sun exposed slopes.

Several concerning weak layers exist in the upper snowpack:

  • Mid February surface hoar and sun crust buried 15 to 40 cm deep.

  • February 7th surface hoar and crust buried 25 to 45 cm deep.

  • January 26th surface hoar, crust, and facet layer buried 50 to 80 cm deep.

The mid and lower snowpack are well settled.

Weather Summary

Wednesday Night
Cloudy. 50 km/h west ridgetop wind. Treeline temperature -6 °C.

Thursday
Cloudy. 3 to 15 cm of snow; then another 10 to 15 cm snow overnight. 60 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Friday
Mostly cloudy. 3 to 10 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -5 °C.

Saturday
Sunny. 25 km/h west ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • In times of uncertainty, conservative terrain choices are our best defense.

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