Bulletin d’avalanche

Sea To Sky

Apr 5 – 6, 2025Avalanche Canada
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Archivé · expiré last year

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

Forecast snow and wind will form fresh storm slabs most reactive to human triggers in wind affected terrain at upper elevations.

Avalanche danger is expected to increase throughout the day.

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5

    Cornices loom over ridgetops and may be triggered by rapid snow loading or people traveling along ridgelines.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    Storm slabs are expected to be most reactive in wind affected terrain at upper elevations.

Confidence

Moderate

Avalanche Summary

On Friday, a size 2 cornice fall was reported near Whistler.

Forecast snow and wind are expected to form reactive storm slabs on Sunday.

Snowpack Summary

Forecast 15 to 25 cm of snow (above 1500 m) on Sunday will form fresh storm slabs. They will be sitting on either moist snow or a crust everywhere except north facing slopes in the alpine where they will overlie a mix of dry snow and surface hoar. The storm slabs are expected to be most reactive in wind affected terrain at upper elevations.

Old persistent weak layers may still exist 1 to 3 m deep on high north-facing slopes.

The snowpack thins quickly at lower elevations.

Weather Summary

Saturday Night

Cloudy with flurries, 0 to 5 cm snow. 20 to 30 km/h south ridgetop wind. Treeline temperature 2 °C. Freezing level 2000 m.

Sunday

15 to 25 cm snow above 1500 m, rain below. Another 15 to 25 cm snow overnight. 30 to 40 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m. and lowering throughout the day.

Monday

Cloudy with flurries, 5 to 10 cm of snow above 1000 m. 10 to 20 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1300 m.

Tuesday

Cloudy with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h south ridgetop wind. Treeline temperature -1 °C. Freezing level 1300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche danger is expected to to increase throughout the day, think carefully about your exit plan from the backcountry.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Make conservative terrain choices and avoid overhead hazard.
  • Use small, low consequence slopes to test the bond of the new snow.

Régions couvertes