Bulletin d’avalanche

North Columbia

Avalanche Canada
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Danger d’avalanche

Wed
Thu
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
    Taille
    1–2

    Wind slabs may still avalanche under the weight of a human, especially if they are not sticking well to the crust below.

  • 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

    With above zero temperatures remaining into the alpine overnight, expect surface snow to remain wet or moist on all aspects. Wet avalanches will be largest and most likely in the heat of the afternoon on slopes facing the sun.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.

Avalanche Summary

On Sunday, north of Blue River, a small (size 1) natural wet loose avalanche cycle was reported on steep treeline 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

Monday Night

Partly cloudy. 1 to 5 mm of rain at treeline, with the highest amounts most likely in the Cariboos. 30-60 km/h west ridgetop wind, with the highest speeds being in the north and east of the forecast area. Treeline low 1 °C. Freezing level falling to 2000 m.

Tuesday

Mostly sunny. 25-40 km/h west ridgetop wind, with the highest speeds being in the north and east of the forecast area. Treeline high 4 °C. Freezing level rising to 2300 m.

Wednesday

Mostly sunny. 1 to 5 mm of precipitation as snow or rain at treeline. 30 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1600 m.

Thursday

Mix of sun and clouds. 1 to 4 cm of snow. 30 km/h northwest ridgetop wind. Treeline temperature -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Pay attention to isolated wind affected features in the alpine, as well as cross-loaded features at treeline.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Régions couvertes