Bulletin d’avalanche

Northwest Coastal

Avalanche Canada
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Danger d’avalanche

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

Points saillants

Avalanche danger will increase through the day with warming and sun. Plan your trip accordingly.

Dry, wintry snow may persist on north-facing alpine slopes, along with reactive wind slabs.

Problèmes avalancheux

  • Wind Slabs

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

    On north-facing and high-alpine slopes where dry, loose snow may persist, wind slabs remain possible.

  • Cornices

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

    Cornices will weaken with daytime warming and solar input.

  • Loose Wet

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

    Wet loose avalanches are most likely during periods of direct solar input and as temperatures rise later in the day.

Confidence

Moderate

  • We are uncertain about how the timing or intensity of solar radiation will affect the snowpack.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

Limited overnight refreeze, daytime warming and the warm April sun continue to initiate wet loose avalanches up to size 2.5.

Check out these MIN reports from Saturday for more details:
Cornice abound and Zymbuck and Pollywood

Snowpack Summary

A widespread surface crust is likely to form overnight at treeline and above, except in high-alpine terrain (above ~2000 m), particularly on north aspects, where dry, wind-affected snow may persist.

Below treeline, a limited overnight refreeze is likely to result in a moist or isothermal upper snowpack. With daytime warming and a chance of sun, the upper snowpack will weaken throughout the day.

Weather Summary

Monday Night
Clear skies. 30 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1600 m.

Tuesday
Mostly sunny. 30 km/h northwest ridgetop wind. Treeline temperature 2 °C. Freezing level 1500 m.

Wednesday
Mostly sunny. 30 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1200 m.

Thursday
Mostly sunny. 30 km/h northwest 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 will increase as the surface crust breaks down.
  • Think carefully about your exit plan from the backcountry because avalanche danger is expected to increase throughout the day.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Régions couvertes