Bulletin d’avalanche

Coquihalla

Apr 17 – 18, 2023Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Assess for how the new snow is bonding to the snowpack before committing to high consequence terrain.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Small storm slabs may form as snow accumulates at higher elevations. Assess for how the snow bonds to previous surfaces, particularly where it builds over a hard melt-freeze crust.

Confidence

Moderate

Avalanche Summary

Several small wet loose avalanches were observed in the region over past few days. Looking forward, a cooling trend with some new snow may form small storm slabs that could be triggered by riders.

Snowpack Summary

Around 5 to 15 cm of new snow is expected above 1100 m by the end of Tuesday. This snow will build on a consolidated snowpack composed of hard snow and bonded melt-freeze crusts. Cornices are very large along alpine ridges.

Weather Summary

Monday Night

Cloudy with snowfall, accumulation 2 to 5 cm with local enhancements possible, 20 km/h southwest wind, treeline temperature -7 °C.

Tuesday

Mostly cloudy with intermittent snowfall, accumulation 2 to 5 cm with local enhancements possible, 20 to 30 km/h southwest wind, treeline temperature -6 °C, freezing level 1100 m.

Wednesday

Mix of sun and cloud with no precipitation, 10 km/h southwest wind, treeline temperature -4 °C, freezing level 1400 m.

Thursday

Cloudy with light snowfall, accumulation 1 to 3 cm, 10 km/h southwest wind, treeline temperature -5 °C, freezing level 1300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Minimize your exposure time below cornices.
  • Be alert to conditions that change with aspect and elevation.

Régions couvertes