Bulletin d’avalanche

Sea To Sky

Avalanche Canada
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Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 5 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Temperatures and danger ratings are falling.

Watch for lingering wind slabs and large cornices as you gain elevation.

Problèmes avalancheux

  • Wind Slabs

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

    Wind slabs remain triggerable on north facing, alpine slopes unaffected by the sun and recent warming.

  • Cornices

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

    Large, fragile cornices exist. Be aware of overhead hazard, and stay back from overhanging cornices on ridgelines.

Confidence

High

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.

Avalanche Summary

On Sunday, wet loose activity was reported at all elevations to size 2.5. In addition, numerous cornice falls and wind slab avalanches were reported.

As temperatures cool, wet loose activity is unlikely.

Snowpack Summary

Overnight cooling will likely form a widespread surface crust. Beneath the crust, the upper snowpack will remain moist, gradually refreezing as temperatures drop.

Dry snow remains on the highest, north facing slopes spared from the warming. This sits over a crust/facet layer from late March.

A thick crust sits 80-100 cm deep. Near Whistler, some facets have been reported around this crust. The snowpack below is moist, but well settled and strong.

Weather Summary

Monday Night
Mostly clear skies. 40 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1500 m.

Tuesday
Sunny. 20 km/h northwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1400 m.

Wednesday
Sunny. 20 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1500 m.

Thursday

Sunny. 10 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 1900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Régions couvertes