Lawinenlagebericht

South Rockies

Mar 22 – 23, 2022Avalanche Canada
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Archiviert · abgelaufen 5 years ago

Lawinengefahr

Thu
Fri
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
3 · Erheblich
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Kernpunkte

Avalanche danger will increase during periods of strong solar radiation.

Head out with a conservative mindset and dial back your terrain choices until the weather cools.

Lawinenprobleme

  • Wind Slabs

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

    Recent snowfall and westerly winds are expected to have formed wind slabs in lee features in the alpine. 

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1.5–3

    Cornices have grown significantly in the past two weeks. Warm temperatures may make cause cornices to become weak. Cornice failures are dangerous on their own, but also have the potential to trigger larger avalanches on the slopes below.

    Give them a wide berth when travelling on ridge-lines and minimize overhead exposure to large cornices.

  • Loose Wet

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

    If the sun comes out on Wednesday, warm temperatures compounded by strong solar radiation may weaken the upper snowpack, creating wet loose avalanches out of steep terrain.

Confidence

Moderate - Uncertainty is due to the timing or intensity of solar radiation and its effect on the snowpack. Uncertainty is due to difficult to forecast freezing levels.

Weather Forecast

TUESDAY NIGHT: Partially cloudy. Moderate to strong southwesterly winds. Freezing level around 2500 m.

WEDNESDAY: Mainly cloudy. Moderate to strong southwesterly winds. Freezing level around 2000 m.

THURSDAY: Partially cloudy with light precipitations. Light variable winds. Freezing level around 1500 m.

FRIDAY: Partially cloudy with light precipitation. Light southwest winds. Freezing level around 1600 m.

Avalanche Summary

At the time of publishing, avalanche activity in the past week has been limited to small wind slabs and wet loose avalanches (size 1).

Snowpack Summary

5-10 cm of recent snowfall has been redistributed by strong westerly winds, building windslab in lee areas. The surface is moist and crusty below 1800 m on all aspects and on solar aspects into the alpine. The upper snowpack contains several crust layers, and the snow is well bonded to these crusts.

Terrain and Travel

  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.
  • Cornices become weak with daytime heating.
  • Avoid steep slopes when air temperatures are warm, or solar radiation is strong.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

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