Lawinenlagebericht

South Columbia

Mar 9 – 10, 2026Avalanche Canada
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Archiviert · abgelaufen 7 months ago

Lawinengefahr

Wed
Thu
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Uncertainty about the status of buried weak layers will keep us tiptoeing around the mountains for now...

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2.5

    Dry snow at upper elevations may remain reactive to rider triggers especially where it's been affected by wind.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–4

    Multiple weak layers are present between roughly 80 and 180 cm deep. We suspect the recent storm cycle may have wiped them out, especially at lower elevations, but we can't yet rule them out with any certainty.

Confidence

Low

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

Avalanche Summary

A widespread natural avalanche cycle occurred during the storm on the weekend including:

  • Numerous size 3-3.5 persistent slab avalanches at alpine and treeline elevations, running on one of the January or February layers.

  • Storm and wind slabs size 2-3, on a variety of aspects at all elevations. In a few cases, slabs were remotely triggered by riders and vehicles.

  • A natural loose wet cycle size 2-3 at treeline and below.

Snowpack Summary

10-30 cm of dry snow accumulates over a wind-sculpted landscape and crust below ~1900 m. Below, the upper snowpack may be moist, crusty and/or upside-down, depending on elevation and aspect.

Three problematic layers exist n the mid-snowpack. We suspect the recent storm cycle may have wiped them out, especially at low elevations, but we can't yet say for sure.

  • One or two surface hoar layers buried in February are found 60 to 120 cm deep, and in some areas these sit on a thin crust.

  • A deeper, widespread layer buried in late January, made up of surface hoar, facets, and/or a crust, sits 100 to 180 cm deep. Surface hoar within this layer is most preserved and largest in sheltered terrain at treeline and below.

Weather Summary

Monday Night
Mostly cloudy. 3 to 5 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -11 °C.

Tuesday
Mostly cloudy. 1 to 3 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -11 °C.

Wednesday
Mostly cloudy. 5 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Thursday
Mostly cloudy. 5 to 10 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Be mindful that deep instabilities are still present and have produced recent large avalanches.
  • Uncertainty is best managed through conservative terrain choices.

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