Lawinenlagebericht

South Coast Inland

Avalanche Canada
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Lawinengefahr

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

Kernpunkte

Wet avalanches remain a concern in the sun and warmth.

Large cornice falls may trigger deeper layers on the slopes below. Be very cautious of overhead hazard.

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1.5–2.5

    Cornices are large and fragile, with warming temperatures there is a chance that a cornice fall may trigger a large, deeper avalanche on slopes below.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–3.5

    Two crusts, buried in early February (facets on top) and March seem to be gaining strength. It's still smart to avoid thin, rocky areas on steep slopes, and avoid exposing yourself to slopes below large cornices.

  • Loose Wet

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

    Rising temperatures and full sun will create ideal conditions for loose wet avalanches. Watch for likely trigger points, like rocky outcrops where warming is most intense.

Confidence

High

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.
  • We are confident the likelihood of avalanches will increase with the forecast weather.
  • We are confident the snowpack will rapidly weaken with the forecast weather.

Avalanche Summary

On Saturday, wind slabs were reported in alpine north-facing terrain and south-facing slopes at all elevations produced wet avalanches.

If you are heading into the backcountry, consider sharing your observations and posting a MIN.

Snowpack Summary

While overnight cooling may produce a surface crust, snow surfaces will rapidly become moist/wet with sunshine and rising temperatures. High north facing slopes may still hold dry, cold snow. Many operators are commenting on large cornices - give them a wide berth as temperatures rise.

Expect to find 30 to 50 cm of settling snow over a thick and hard crust below about 1900 m, and old wind-affected snow at upper elevations.

Two older crusts (1-1.5 m deep) previously produced large to very large avalanches, but they seem to have gained strength and are not a current concern. However, each day of warm weather may increase the likelihood of these layers becoming active again.

Weather Summary

Sunday Night
Clear skies. 30 km/h southwest ridgetop wind. Treeline temperature 3 °C. Freezing level 2700 m.

Monday
Sunny. 60 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 2300 m.

Tuesday
Mostly sunny. 2 to 3 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -4 °C.

Wednesday
Mostly sunny. 20 km/h northwest ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • The likelihood of deep persistent slab avalanches will increase with each day of warm weather.

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