Lawinenlagebericht

Northwest Inland

Jan 15 – 16, 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

The best riding will be found in sheltered terrain above 1300 m, where the snow isn't wind-affected or crusty.

Lawinenprobleme

  • Wind Slabs

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

    Strong ridgetop winds have been building wind slabs. Use extra caution on leeward slopes.

  • Persistent Slabs

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

    A widespread crust with weak facets overtop is buried 40-80 cm deep. While this layer exists on all aspects, it's most likely to be triggered by a heavy load on wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

Over the weekend, a size 1 snowmobile-triggered persistent slab was observed. Small wind slabs in Cabin Bowl, Hankin area were reported.

Last week, cornice fall was seen, and one was reported to have stepped down the persistent weak layer.

Natural avalanche activity has likely subsided, but we expect human-triggering to remain possible.

Snowpack Summary

Strong to extreme westerly through northwesterly winds have scoured snow on windward faces and built thick wind slabs on lee slopes. These slabs may be slowly bonding. The snow surface on south-facing slopes and areas below 1200–1300 m is expected to be crusty.

A persistent weak layer composed of facets overlying a crust is buried 40 to 80 cm deep. A couple of recent wind slabs have stepped down to this layer. It has been stubborn to unreactive in recent snowpack tests, but may remain possible to trigger in isolated areas.

Weather Summary

Tuesday Night

Cloudy with 1 to 5 cm of snow. 15 to 50 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1000 m.

Wednesday

A mix of sun and cloud with isolated flurries. 30 to 90 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1500 m.

Thursday

A mix of sun and cloud with isolated flurries. 40 to 90 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 700 m.

Friday

A mix of sun and cloud. 40 to 50 km/h northwest ridgetop wind. Treeline temperature -9 °C. Freezing level valley bottom.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.

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