Bulletin d’avalanche

Tetons

Bridger-Teton Avalanche Center
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Danger d’avalanche

Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 8 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Spring is once again gaining ground on the higher elevation, winter snowpack. Temperatures are starting out around 5 degrees warmer than yesterday morning. At the mid and upper elevations, wet slides will be the primary concern as temperatures warm and cloud cover decreases. Shallow, wet loose slides will be likely on sunlit aspects, and wet slabs might release naturally during the heat of the day. In very steep, avalanche-prone terrain that has not undergone significant warming, the chance for skiers and riders to trigger small to large wind slabs will also be on the increase. Daytime warming will also raise the likelihood of cornice failures. Get an early start, monitor the effect that warming temperatures and sunshine have on the snowpack, and have a plan to transition to cooler terrain or be willing to come back another day. At the lower elevations, the snowpack is mostly stable where it still exists.

Problèmes avalancheux

  • Wet Slabs

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

    Both wet slabs and wet loose slides will become possible today. Temperatures remained above freezing overnight in many areas up to 8,500 feet, and some cloud cover through the night limited radiational cooling. Wet loose slides will pose their greatest threat in confined terrain and very steep couloirs where small slides can quickly grow and entrain significant amounts of snow. Be mindful of both the terrain that you are on and the terrain above you. Wet slabs might develop on slopes where old, dry snow is beginning to thaw for the first time. Breaking through once supportable crusts is a good prompt to alter your travel plans.

  • Wind Slabs

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

    Recently developed wind slabs up to two feet in depth can still be found in high elevation terrain that has not experienced a significant warming event. Up there, the chance for backcountry travelers to trigger these slabs will be on the increase as the day warms, and shedding of these slabs might occur naturally in the afternoon. These dry slabs are likely to be deeper and more widespread in the cooler terrain above 10,500 feet.

Avalanche Discussion

Conditions will remain dry through the weekend. Clear skies will allow temperatures to drop into the mid to upper 20s overnight. Daytime highs will rise into the 40s and 50s in the mountains. Winds will back to the west and stay light at 5 to 10 miles per hour. Very warm temperatures and abundant sunshine will create unstable conditions on steep snow covered slopes after snow surfaces soften. Wet loose slides are likely on steep slopes in the afternoon and wet slab avalanches are possible. The general avalanche hazard is expected to be LOW below an elevation of 10,500 feet in the early morning hours and increase to MODERATE after snow surfaces warm and then to CONSIDERABLE during the warmest portion of the day. Monitor conditions and avoid steep terrain after snow surfaces become unstable.

Régions couvertes