Lawinenlagebericht

Purcells

Jan 13 – 14, 2025Avalanche Canada
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Archiviert · abgelaufen 2 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Steep open slopes are the most dangerous, as wind slabs may be slow to bond.

Lawinenprobleme

  • Wind Slabs

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

    Recent westerly wind formed slabs above crust and surface hoar layers in alpine and treeline terrain.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–2.5

    The early December weak layer remains a concern in areas with a shallow snowpack, particularly on steep rocky slopes.

Confidence

Moderate

Avalanche Summary

Two notable avalanches occurred in the Dogtooth Range on Saturday:

  • A skier was caught in a size 2.5 wind slab avalanche that propagated widely across a northeast-facing slope. It ran on a 5 to 40 cm deep surface hoar layer. See this MIN report for details.

  • A group of skiers remotely triggered a size 2.5 persistent slab avalanche on a large southwest-facing alpine slope.

Many smaller (size 1 to 1.5) wind slab avalanches were also reported across the Purcells.

Snowpack Summary

Surface hoar and sun crusts are developing on the surface. Recent snow (10 to 30 cm) sits on a variety of interfaces including surface hoar in sheltered areas and sun crusts on solar slopes. Deeper wind-loaded pockets also exist above these layers.

A weak layer of facets buried in early December is on average 60 to 90 cm deep (except closer to 30 cm in the shallower eastern parts of the Purcells). This layer continues to cause occasional large avalanches in the Golden and Invermere areas.

The snowpack base consists of a thick crust and facets in many areas.

Weather Summary

Sunday Night

Partly cloudy. 20 km/h northwest ridgetop wind. Treeline temperature -12 °C.

Monday

Sunny. 10 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Tuesday

Mostly sunny. 10 km/h west ridgetop wind. Treeline temperature -5 °C.

Wednesday

Mix of sun and cloud. 20 km/h west ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use conservative route selection and resist venturing into complex terrain.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Abgedeckte Regionen