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 11 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Backcountry riders and skiers have the potential to trigger wind slabs in steep, wind-loaded terrain or deeper persistent slabs that lie upon buried weak snow near the ground. Moderate danger indicates that these slabs require the weight of a backcountry skier or rider to initiate them and that they are not likely to release naturally. The snowpack is weak and careful evaluation of the snowpack and terrain is necessary today.

Problèmes avalancheux

  • Wind Slabs

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

    Skiers and riders could trigger new and recently developed soft wind slabs on all aspects and elevations. At the higher elevations, these slabs could have depths to two feet and fail on old hard surfaces or density breaks within the recent snowfall. Beware of steep terrain with obvious areas of wind loading. Direct sunlight and warming temperatures will increase the sensitivity of these slabs this afternoon.

  • Persistent Slabs

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

    Above 7,500 feet, hard slabs with depths to four feet lie upon persistent weak layers of faceted snow. Large triggers, such as groups of people pr the release of a wind slab, may be needed to trigger one of these slides. However, the weight of a single skier or rider could still act as a trigger.The release of a wind slab could also step down to these basal facets. If triggered, these slabs will carry high consequences.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )Periods of light snow or flurries are possible in the mountains this evening as the system moves to the east. By morning valley fog is expected on the east side of the Tetons and in Star valley. Mostly clear skies are expected above the low cloud layer although some mountain top clouds could linger. Temperatures are to rise from the teens to the mid to upper twenties. Northwest winds are to have ten to twenty mile per hour averages overnight. The general avalanche hazard is expected to be Considerable in the Teton and Southwest trails areas and Moderate in the Togwotee Pass area where significantly less snow has fallen during the past week. Winds slabs will still be easily triggered in steep wind loaded terrain with depths to three feet at higher elevations. The chance also continues for large dangerous avalanches to occur above 7500 feet where weak snow persists at the base of the snowpack. Large triggers such as the triggering of a surface avalanche are the most likely events to cause their failure. In areas where that weakness is less buried these slabs will be easier to trigger. A cautious approach is needed when dealing with rapid loading events such as has occurred over the last seven days.

Régions couvertes