Bollettino valanghe

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole
Open full map
Non aggiornato — questo bollettino è scaduto 6 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Dangerous avalanche conditions continue in terrain above 8000 feet. Although a slight chance remains to trigger wind slabs formed during the last storm, the primary concern lies with the deeper persistent slab problem that involves weak snow that was buried on December 11th. Cautious route finding is essential today as the deep problem is widespread and it is becoming increasingly difficult to predict which slopes may or may not fail. The best course of action is to avoid steep avalanche prone terrain. Below 8000 feet, avalanches are unlikely today except in steep isolated terrain features.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3

    Avalanches involving weak faceted snow and crusts that formed in early December could be human triggered today. These slabs are likely to be hard and could have depths to four feet. In some areas, these slabs have become less sensitive to triggers which can be misleading as a slope can still fail to the weight of a single person, even after it has been tracked. Under these conditions, it is also possible to trigger an avalanche while well below the steep part of a slide path.

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–2

    Winds that were from the southwest to west during Saturday's storm and from varying directions since have formed slabs on the surface of the snowpack in terrain above 8500 that is prone to wind loading. These soft slabs could be triggered on steep loaded terrain features with depths to eighteen inches.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )Cold temperatures and light winds are expected tonight into tomorrow morning. Inversions will again set up with bitter temperatures in the valleys while higher elevations start in the single digits. A weak system will move in and bring the possibility of light snow by mid-afternoon. The general avalanche danger will remain Considerable above 7500 feet in the Teton and Southwest Trails area and Moderate in the Togwotee Pass area. It will be Low below that elevation. The problem is the same in all locations. Although smaller wind slabs could still be triggered, the primary concern is for failures to occur deeper in the snowpack. These slides could be hard slabs and very large in the Teton and Southwest trails areas where they will also be more sensitive and could be triggered remotely. Although the Togwotee pass area has a similar problem, less loading has occurred there so the slides have not been as sensitive or as large. At lower elevations, the snowpack structure is poor but depths remain low and activity is limited to isolated very steep terrain features. The travel advise is to simply avoid steep, known avalanche paths and enjoy the great conditions that are present in lower angle terrain. Under these conditions, snowpack evaluation can provide insights into what the snowpack layering is like and in knowing where future weaknesses lie but be cautious in allowing any test results to green light any steep slopes.

Regioni coperte