Lawinenlagebericht

Microwave-Sinclair

Mar 19 – 20, 2025Avalanche Canada
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Archiviert · abgelaufen 2 years ago

Lawinengefahr

Fri
Sat
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Watch for reactive wind slabs forming at higher elevations.

It is still possible to trigger weak layers deep in the snowpack. If you observe signs of instability, head to simple terrain.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–1.5

    Wind slabs will be most reactive where they overly surface hoar.

  • Persistent Slabs

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

    Facets and/or surface hoar buried 50 to 80 cm deep are most prominent on north-facing slopes. Avoid areas with a thin or variable (thin to thick) snowpack.

Confidence

Moderate

Avalanche Summary

Rider triggered size 1 wind slabs were reported on Monday, during active loading from westerly winds at Ashman and Silvern Lakes.

Snowpack Summary

Light snow and strong southwest winds are likely forming wind deposits on north facing slopes. A widespread layer of surface hoar is buried 10 to 30 cm deep, which overlies crust on solar aspects and at low elevations.

A layer of facets, surface hoar and/or a crust buried in mid February is 30 to 50 cm below the snow surface and has been reactive in snowpack tests.

Deeper in the snowpack, a weak layer of facets and a crust from early December can be found. This layer appears to be dormant but is still worth keeping in mind in thin snowpack areas in the alpine.

Weather Summary

Wednesday Night

Cloudy with 2 to 3 cm of snow. 40 to 60 km/h southeast ridgetop wind. Treeline temperature -4 °C.

Thursday

Mostly cloudy with 1 to 2 cm of snow. 30 to 60 km/h south ridgetop wind. Treeline temperature -5 °C.

Friday

A mix of sun and cloud with flurries 30 to 40 km/h southwest winds at ridgetop. Treeline temperature -1 °C. Freezing levels reach 1300 m.

Saturday

A mix of sun and cloud with flurries 30 to 40 km/h southwest winds at ridgetop. Treeline temperature -1 °C. Freezing levels reach 1300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid shallow snowpack areas, rocky outcrops, and steep terrain where triggering is most likely.
  • Be aware of the potential for large avalanches due to buried weak layers.

Abgedeckte Regionen