Lawinenlagebericht

South Columbia

Avalanche Canada
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Lawinengefahr

Tue
Wed
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 hazards.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2

    Loose wet avalanches are likely with the high freezing levels and sun exposure.

Confidence

Moderate

  • 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.

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

Sunday Night

Clear skies. 20 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 2300 m.

Monday

Mostly sunny. 30 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 2500 m.

Tuesday

Mostly cloudy. 3 to 5 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1700 m.

Wednesday

Mix of sun and clouds. 1 to 2 cm of snow. 30 km/h northwest ridgetop wind. Treeline temperature -5 °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.
  • 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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