Lawinenlagebericht

South Columbia

Avalanche Canada
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Lawinengefahr

Mon
Tue
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
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Veraltet — dieser Lagebericht ist 5 months ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Keep an eye on changing conditions and dial back your objectives.

We are confident that warming and solar will trigger avalanches, but we are uncertain in the size that will occur.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–2

    Wind slabs may linger in the immediate lee of peaks and ridges.

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–3

    Keep your head up and look for overhead hazard. Minimize time travelling under these hhazards.

  • Wet Slabs

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

    Wet slab avalanches are possible as the upper snowpack becomes wet from solar input and rising freezing level.

    Wet loose avalanches are also likely.

Confidence

Low

  • We are confident that there are weak cornices, but uncertain about how likely they are to trigger.
  • We are uncertain due to variable freezing levels.
  • We are confident the likelihood of avalanches will increase with the forecast weather.

Avalanche Summary

On Friday one size 2 natural glide slab release was reported. These hazards are more likely to release during significant warming events. Avoid travelling under these hazards.

Over the past 4 days numerous natural cornice failures were reported. Even without triggering slabs on the slopes below debris piles were up to size 2.5.

Numerous loose avalanches have been observed in steep or extreme terrain. These avalanches have grown in size over the past two days, up to size 2.

Snowpack Summary

Surface conditions are highly variable:

·        In exposed alpine terrain recent variable wind has scoured ridge tops and formed small wind slabs in lee features.

·        Sheltered treeline features may hold dry snow.

·        Below treeline A firm crust is on or just below the surface on all aspects.

·        A crust exists on or near the surface on sun exposed slopes. This crust will break down with solar input and rising freezing level.

Convective flurries over the past two weeks have deposited highly variable amounts of snow above the atmospheric river crust. Depending on drainage and elevation, you may find 30 to 100 cm above this crust, which extends to at least 2300 m.

The remainder of the snowpack is well consolidated.

Weather Summary

Saturday Night
Partly cloudy. 1 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1800 m.

Sunday
Mix of sun and clouds. 2 mm of rain at treeline, snow in the alpine. 20 km/h west ridgetop wind. Treeline temperature 2°C. Freezing level 2500 m.

Monday
Mix of sun and clouds. 1 to 3 mm of rain at treeline, snow in the alpine. 30 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 2600 m.

Tuesday
Mostly cloudy. 4 to 10 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 1600 m.

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.
  • Loose avalanches may start small, but they can grow and push you into dangerous terrain.
  • Avoid travelling on slopes below cornices.
  • Be careful as you transition into wind-affected terrain.

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