Bulletin d’avalanche

North Columbia

Avalanche Canada
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Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
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

Strong sun and warming will increase the likelihood of both natural and human-triggered avalanches.

Problèmes avalancheux

  • 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. Cornices will become increasingly fragile as temperatures rise through the weekend.

  • Storm Slabs

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

    Watch for winds leaving more reactive pockets in lee features. Strong solar radiation may increase the cohesion and reactivity of loose snow, especially on steep slopes in the alpine.

  • Loose Wet

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

    Watch for sunny skies and warm spring temperatures to trigger wet loose avalanches on solar slopes. Expect this problem to increase at upper elevations and all aspects with rising freezing levels.

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

No new avalanches have been reported in this region over the last few days. 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

Saturday Night

Mostly clear skies. 1 mm of rain at treeline. 30 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 2000 m.

Sunday

Mostly cloudy. 1 to 3 mm of rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 2000 m.

Monday

Mostly cloudy. 1 to 2 mm of rain at treeline. 40 km/h west ridgetop wind. Treeline temperature 3 °C. Freezing level 2200 m.

Tuesday

Mostly cloudy. 5 to 15 mm of rain at treeline. 30 km/h west ridgetop wind. Treeline temperature 4 °C. Freezing level 2300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • 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.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

Régions couvertes