Bulletin d’avalanche

Long Range Mountains

Avalanche Canada
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Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
Sans niveau
Périmé — ce bulletin a expiré 6 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

New snow, cool temperatures and wind over the past week have created great riding conditions.

Stay aware of current avalanche problems and avoid terrain where they may exist.

Problèmes avalancheux

  • Wind Slabs

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

    Strong west winds over the past week have loaded predominantly east aspect terrain. Avoid lee areas with deep deposits and areas below ridgetop that present large pillows of deep snow.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2.5

    New and sensitive cornices have formed at ridgetop Remain cautious and give these features a wide berth when travelling above or below them.

  • Persistent Slabs

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

    A weak crust with sugary facets has formed on steep sun-exposed slopes. This problem is healing but may persist on isolated south-facing slope. Avoid being on or beneath them for now.

Confidence

Moderate

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

Avalanche Summary

On Friday near ten mile pond, the field team reported a large avalanche (size 2) that had failed on a south aspect. We suspect this is older than 48 hours and is likely to have failed on the late February persistent slab avalanche problem interface.

We value your field experiences and photos. Please consider submitting your observation via this link to the mountain information network.

Snowpack Summary

30 to 40 cm of new snow that has fallen over the past week. In wind-exposed areas, it has been redistributed by strong west into lee features, forming new wind slabs.

50 to 80 cm deep, on steep southeast through southwest slopes, a crust with weak, sugary facets on top has been observed. If triggered, this layer could produce large to very large avalanches.

The mid and lower snowpack is well settled, with no layers of concern.

Weather Summary

Friday Night
Mostly clear skies. 40 km/h west ridgetop wind. Treeline temperature -12 °C.

Saturday
Mix of sun and clouds. 70 km/h west ridgetop wind. Treeline temperature -8 °C.

Sunday
Cloudy. 40 to 65 mm of rain at treeline. 80 km/h southwest ridgetop wind. Treeline temperature 2 °C.

Monday
Mostly cloudy. 5 to 10 mm of rain at treeline. 40 km/h west ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent strong wind means wind slabs may be found farther downslope than expected.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.

Régions couvertes