Bulletin d’avalanche

Tetons

Bridger-Teton Avalanche Center
Voir sur la carte

Danger d’avalanche

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

Points saillants

Temperature inversions strengthened overnight, and the mountains are starting out a few degrees warmer than yesterday. Recent avalanche activity in Western Wyoming has resulted in one fatality and one near miss. This is a good reminder that skiers and riders still have some potential to trigger small to large persistent slab avalanches in steep, avalanche prone terrain at the mid and upper elevations. Monitor warming conditions which could produce shallow point slides in very steep sunlit couloirs, and don’t let blue skies impair your judgement. At the lower elevations, backcountry travelers might be able to trigger an isolated pocket of shallow slab in very steep terrain.

Problèmes avalancheux

  • Persistent Slabs

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

    Weak layers of faceted snow in the form of buried near surface facets and surface hoar persist in the snowpack. In steep terrain above 7,500 feet, some potential remains for skiers and riders to trigger slab avalanches failing on these weak layers to depths of one to three feet. Keep in mind that there is a significant amount of spatial variability associated with these weak layers. Evaluate the snowpack often, and don’t assume that one snowpit will give you a representative picture of the avalanche hazard. Below 7,500 feet, backcountry travelers might be able to trigger a small surface slab on isolated terrain features.

Avalanche Discussion

High pressure will continue to control the weather. Fog is likely to develop in the valleys by morning and burn off during the day. Temperatures will remain inverted. Temperatures will be in the upper teens to low 30s in the mountains and from below zero to near 20 in the valleys.The general avalanche hazard is expected to be moderate above an elevation of 7,500 feet. On some steep slopes the weight of a single person could trigger slab avalanches one to three feet in depth on persistent buried weak layers of faceted snow. Evaluate terrain and snowpack carefully. Avalanches are unlikely below an elevation of 7,500 feet.

Régions couvertes