Lawinenlagebericht

Coquihalla

Mar 3 – 4, 2026Avalanche Canada
Auf der Karte ansehen
Archiviert · abgelaufen 7 months ago

Lawinengefahr

Thu
Fri
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Multiple large, human-triggered persistent slabs have occurred in the past few days.

Choose conservative low-angle terrain with no overhead hazard.

Lawinenprobleme

  • Wind Slabs

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

    Fresh, reactive wind slabs will form throughout the day on Tuesday.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1.5–3

    A persistent weak layer consisting of facets over a hard crust has been very reactive in recent days. Avoid overhead hazard; remote triggering is a concern with this layer.

Confidence

Moderate

  • Persistent slabs could become more likely with the forecast weather.

Avalanche Summary

On Sunday, a size 2 persistent slab was remote triggered in Allison Pass. Details here.

A serious avalanche accident occurred Saturday on Thar Peak. 3 skiers were bootpacking up a couloir when they triggered a size 3 persistent slab. All were partially buried and sustained serious injuries.

Another size 2 persistent slab was remote triggered on Thar Peak Saturday.

See photos for details.

Looking forward, large human-triggered persistent slab remains the main concern.

Snowpack Summary

Up to 20 cm of new snow will arrive by Tuesday afternoon, accompanied by strong southerly winds. This new snow overlies a melt-freeze crust on solar aspects and lower elevations, and wind-affected surfaces at higher elevations.

A persistent weak layer consisting of a crust/ facet layer from late January can be found 40 to 60 cm deep across the region. This layer has been reactive in recent days.

The snowpack below is strong and well-bonded.

Weather Summary

Monday Night

Partly cloudy. 1 mm of precipitation as snow or rain at treeline. 40 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

Tuesday

Cloudy. 10 to 20 cm of snow at treeline. 40 to 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1600 m.

Wednesday

Mostly cloudy. 5 to 10 cm of snow or rain at treeline. 40 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1500 m.

Thursday

Mostly cloudy. 5 to 10 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.



More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Remote triggering is a big concern, be aware of the potential for wide propagations and large, destructive avalanches at all elevations.
  • If triggered, wind slabs may step down to deeper layers, causing larger avalanches.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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