Bulletin d’avalanche

North Columbia

Avalanche Canada
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Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
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

Watch for changing conditions as you change aspect and elevation.

The highest avalanche danger will be on wind-loaded slopes, and steep slopes seeing intense spring sun.

Problèmes avalancheux

  • Wind Slabs

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

    Watch for winds leaving more reactive pockets in lee features.

  • Cornices

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

    Cornices are large, looming, and can trigger large avalanches on the slopes below. Cornice failures will be most likely when the daytime temperatures are at their warmest, and when the sun is out.

  • Loose Wet

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

    While temperatures remain warm, much of the forecast area will be cloudy on Monday. The chance of wet loose avalanches will be highest in places that are experiencing periods of sun.

Confidence

Moderate

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

Avalanche Summary

On Saturday, north of Blue River, a small (size 1-1.5) natural wet loose avalanche cycle was reported on steep slopes facing the sun.

Observations are currently very limited in this region. Please consider submitting a MIN to let us know what you're seeing out there.

Snowpack Summary

At upper elevations, wind, sun, and spring temperatures continue to impact 20 to 40 cm of recent powder. Sun and rising freezing levels will turn snow moist during the day, warm temperatures overnight will prevent a crust from forming.

Below the recent snow, a hard crust exists on all aspects to at least 2500 m.

The mid and lower snowpack is well settled and strong in most areas.

Check out this Conditions Update for tips on managing the current spring conditions.

Weather Summary

Sunday Night

Mostly cloudy. 1 mm of rain at treeline. 30-65 km/h west ridgetop wind, with the highest speeds showing up further north and east. Treeline temperature 2 °C. Freezing level 2200 m.

Monday

Mostly cloudy. 30-65 km/h west ridgetop wind, with the highest speeds showing up further north and east. Treeline high 5 °C. Freezing level rising to 2500 m.

Tuesday

Mix of sun and clouds. 2 to 10 mm of rain at treeline. 30 km/h west ridgetop wind. Treeline temperature 4 °C. Freezing level 2300 m.

Wednesday

Mix of sun and clouds. 1 to 3 mm of precipitation as snow or rain at treeline. 20 km/h northwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Régions couvertes