Bulletin d’avalanche

Haines Pass

Avalanche Canada
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Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
Sans niveau
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Périmé — ce bulletin a expiré 4 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

While the transition to a spring snowpack has begun, both wind slabs and persistent weak layers remain a concern in steep alpine terrain.

Problèmes avalancheux

  • Wind Slabs

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

    Recent variable winds have created wind slabs in alpine terrain atop a variety of old surfaces.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–4

    A layer of facets over a crust is buried 80 to 150cm. There have been no new reports of avalanches on this layer, and it is likely difficult to trigger with the stable weather, but it may become reactive again with the warming temperatures.

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

No new avalanche activity has been reported.

Snowpack Summary

Recent light snowfall has been redistributed by variable winds at higher elevations.

South-facing slopes likely have a strong, supportive crust in the morning, which will soften throughout the day with daytime warming and sun.

A persistent weak layer of facets and crust is buried 80 to 150 cm deep in alpine terrain. The greatest concern for triggering comes from large loads, such as cornice falls, or from human triggering in areas where the snowpack transitions from thin to thick.

Check out this MIN report from the AvCan Yukon field team for a detailed conditions update.

Weather Summary

Saturday Night
Clear skies. 10 km/h west ridgetop wind. Treeline temperature -2 °C.

Sunday
Mix of sun and clouds. 30 km/h south ridgetop wind. Treeline temperature -4 °C.

Monday
Mostly cloudy. 3 to 5 cm of snow. 20 km/h south ridgetop wind. Treeline temperature -5 °C.

Tuesday
Mix of sun and clouds. 1 to 2 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Be aware of the potential for large, destructive avalanches due to deeply buried weak layers.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Régions couvertes