Bulletin d’avalanche

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Danger d’avalanche

Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 6 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Dangerous avalanche conditions exist above 8,000 feet. Several natural and human triggered avalanches were reported across the region yesterday on a variety of aspects and elevations. These slides were a mix of wind slabs and persistent slabs, and similar events are possible today. While the potential remains for skiers and riders to trigger small to large wind slabs, the primary hazard will be large to very large persistent slab avalanches. Skiers and riders could trigger these deadly slabs on various aspects. Conservative terrain choices and cautious route finding will be essential for safe travel in avalanche terrain. Below 8,000 feet, some potential may remain for skiers and riders to trigger small pockets of slab on isolated terrain features.

Problèmes avalancheux

  • Persistent Slabs

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

    Since early Saturday morning, around 0.75 inches of snow water equivalent was added to faceted layers and crusts in the higher elevations. The underlying persistent weak layers and sliding surfaces vary significantly across the landscape; some slopes are stable, others are not, and it is difficult to distinguish between the two. On a variety of aspects above 8,000 feet, backcountry travelers could trigger these slabs with depths ranging from two to four feet. Below 8,000 feet, the snowpack is mostly stable, and avalanche activity is expected to be isolated to steep terrain features with a deeper snowpack.

  • Wind Slabs

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

    Southwesterly to westerly ridgetop winds at 15 to 30 miles per hour accompanied Saturday’s snowfall, and wind slabs with depths up to 18 inches formed in leeward terrain above 9,000 feet. Skiers and riders still have the potential of triggering these slabs in steep, wind loaded terrain.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )Expect partly cloudy to mostly clear skies overnight and through the day on Monday as a broad trough begins to track across the southwestern US, and southwesterly flow aloft develops over the region. Overnight lows in the mountains will drop into the single digits before rising into the teens during the day. Sunday’s warmup will be followed by cooler temperatures, and the general avalanche hazard is expected to be Considerable above 8,000 feet in the Teton and Southwest Trails forecast zones on Monday. While the potential remains for skiers and riders to trigger small to large wind slabs, the primary hazard will be large to very large persistent slab avalanches failing on crusts and faceted snow from the December 11th interface. In steep terrain up there, backcountry travelers could trigger these slabs on a variety of aspects. The underlying persistent weak layers and sliding surfaces vary significantly across the landscape; some slopes are stable, others are not, and it is difficult to distinguish between the two. Conservative terrain choices and cautious route finding will be essential for safe travel in avalanche terrain on Monday.In the Togwotee Pass forecast zone, the general avalanche hazard is expected to be Moderate above 8,000 feet. On steep, avalanche prone slopes, backcountry travelers have the potential of triggering small pockets of wind slab along with large persistent slabs.

Régions couvertes