Bulletin d’avalanche

Togwotee Pass

Bridger-Teton Avalanche Center
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Danger d’avalanche

Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
Sans niveau
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Périmé — ce bulletin a expiré 7 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Very strong winds and heavy snowfall yesterday morning formed wind slabs on a variety of aspects. These slabs will be larger and more sensitive on the east side of the Continental Divide where significantly more snow has fallen. Evaluate terrain and wind loading carefully and avoid terrain traps where even small slabs can sweep a skier or rider over rocky terrain or bury them in a feature such as a ditch where moving snow will pile up and quickly become deep. A chance also remains for larger triggers such as a snowmachine or a triggered wind slab to initiate a large avalanche involving deeply buried weak layers. If triggered, it would be unlikely to survive one of the deep slab avalanches.

Problèmes avalancheux

  • Wind Slabs

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

    Strong winds that varied from the northwest to the southeast have created soft to hard slabs. Snowfall during this event favored the eastern and southern portions of the forecast area where over a foot of snow fell in some areas. Skiers and riders could trigger these slabs with depths of six inches to two feet in steep terrain. Avoid areas where even a small slab can have serious terrain consequences. Although temperatures are to stay cold today, these slabs could become more sensitive this afternoon in calm areas that receive significant direct sunlight.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3

    Backcountry travelers could trigger persistent deep slab avalanches on buried layers of faceted snow. These dangerous slab avalanches could be two to five feet deep. They are most likely to be triggered by a snowmachine that impacts a shallow portion of the snowpack. A cornice drop or a moving wind slab could also initiate one of these slides.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )Dry conditions are expected tonight through most of Tuesday. Skies are to be mostly clear and temperatures will be cold. Expect sub zero temperatures at all elevations in the morning with highs near ten at the upper elevations and near twenty at the lower elevations. Winds are to be out of the northeast overnight, then backing to the northwest with five to fifteen mile per hour averages during the day. The general avalanche hazard will be Moderate on Tuesday. Wind slabs formed today could be triggered in loaded areas with depths to eighteen inches. These slabs will gain some strength overnight but could still be triggered particularly in unsupported slopes above cliff bands and in steep chutes where a wind drifted pocket may not be apparent from the top but could release mid slope. A remote chance continues for large triggers to trigger deep slab instabilities, particularly in steep known paths such as the east face of Lava Mountain that has not slid yet this year.

Régions couvertes