Lawinenlagebericht

East Purcell

Dec 25 – 26, 2025Avalanche Canada
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Archiviert · abgelaufen 9 months ago

Lawinengefahr

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

Carefully assess steep slopes for fresh wind slabs before committing.

You can find great riding in sheltered terrain with no wind effect.

Lawinenprobleme

  • Wind Slabs

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

    New snow and wind are expected to form wind slabs in leeward terrain.

  • Persistent Slabs

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

    Triggering an avalanche on the mid-November persistent weak layer remains possible above 2100 m.

    This layer may require a larger load like a sled, cornice fall or wind slab stepping down to collapse it.

Confidence

Moderate

  • The snowpack structure is generally well understood.
  • Forecast snowfall amounts are uncertain.

Avalanche Summary

On Tuesday, two size 1.5 cornices fell in the Panorama backcountry.

No slab avalanches have been observed in the region since last Saturday.

Looking forward, we expect fresh wind slabs may be triggerable on Thursday.

If you are travelling in the mountains, please submit any observations to the Mountain Information Network.

Snowpack Summary

Around 5 to 10 cm fell on Wednesday, and another possible 5 cm is expected overnight. Combined with forecast moderate southwesterly winds, we can expect new wind slabs to form at upper elevations.

A crust from mid-December crust can be found down 40 to 80 cm which is present up to approximately 2100 m. This crust seems well bonded and is not concerning at this time.

A persistent weak layer from mid-November made up of a thick crust with overlying facets, and in some cases surface hoar, remains a concern. In eastern parts of the region, it is buried 70–110 cm deep, and up to 180 cm in western areas with a deeper snowpack. In most areas, faceted grains overlie the crust.

Depth hoar is present at the base of the snowpack.

Weather Summary

Wednesday Night
Mostly cloudy. 0 to 5 cm. 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1500 m.

Thursday
Mix of sun and clouds. 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1300 m.

Friday
Mostly cloudy. 5 to 10 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Saturday
Sunny. 5 to 15 cm of snow from Friday night. 20 km/h northwest ridgetop wind. Treeline temperature -15 °C.

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.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Be mindful that deep instabilities are still present in the snowpack.

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