Bulletin d’avalanche

South Coast

Avalanche Canada
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Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 4 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Wind slabs are expected to develop as freezing levels drop and alpine snow accumulates.

Cornices remain a concern near ridge crests.

Problèmes avalancheux

  • Wind Slabs

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

    As the freezing level drops, snow will start to accumulate in alpine lee features.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2

    Large cornices still loom over some ridgelines and they won't hang on forever. Be aware of these overhead hazards and stay well back from overhanging cornices when traveling on ridgetop.

Confidence

Moderate

  • We are uncertain due to the timing, track, and intensity of the incoming weather system.

Avalanche Summary

No recent avalanches have been reported.

Observations are starting to taper off in many regions. If you get out into the backcountry, post a MIN!

Snowpack Summary

Cloud cover and light rain continue to limit crust recovery, keeping the snowpack weak and near isothermal as it gradually melts. About 30 cm of snow has been lost over the past week at mid elevations on the North Shore and at Coquihalla Summit. Light rain has likely reached even the highest north-facing slopes.

As freezing levels drop and precipitation transitions to snow, wind slabs will likely begin to form in alpine terrain.

Watch for isothermal snow—this can make travel difficult and increase the likelihood of wet loose avalanches.

Snowpack loss remains most pronounced below 1000 m and on solar aspects.

Weather Summary

Sunday Night

Cloudy. 2 to 5 mm of rain at treeline. 20 km/h west ridgetop wind. Treeline temperature 2 °C. Freezing level 2000 m.

Monday

Cloudy. 2 to 5 mm of precipitation as snow or rain at treeline. 30 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1600 m.

Tuesday

Cloudy. 15 to 30 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1300 m.

Wednesday

Mix of sun and clouds. 10 to 15 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Cornices often break further back than expected; give them a wide berth when traveling on ridgetops.
  • Watch for signs of slab formation throughout the day.

Régions couvertes