Bollettino valanghe

Tetons

Bridger-Teton Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Tue
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte
Open full map
Non aggiornato — questo bollettino è scaduto 2 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Heavy snow and strong wind have created very dangerous avalanche conditions in the mountains. Slabs ranging from 1 to 3 feet in depth will be reactive to the weight of a skier or snowmobile. Natural avalanches are possible in wind loaded mid/upper elevation terrain and low elevation terrain where the snowpack is saturated from rain. Traveling in, near, or under avalanche terrain is not recommended today.

The NWS has issued a Winter Storm Warning that is in effect until  Monday 11am.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1–2.5

    Heavy snowfall and strong winds from the southwest have formed sensitive wind slabs on a variety of aspects above 7,500’. Large avalanches that are human triggered, or release naturally, are likely in steep terrain at the mid and upper elevations today. Depending on location, these slabs lie upon faceted snow, hard melt-freeze crusts, or wind packed snow. Wind slabs could fail on these recently buried surfaces, or on density breaks within the storm snow with depths ranging from 1-3 feet today. Avalanches failing on density breaks will be on the shallower end of that range, while slides failing on old snow will be deeper. Storm snow instabilities may also be found in terrain sheltered from the wind.

    Be prepared to encounter unstable snow and heads up conditions if travelling in the mountains today. Obvious signs of instability such as recent avalanches, shooting cracks, and collapsing indicate that the snow is ripe for avalanching. Triggering avalanches from a distance is possible today. Given the potential for natural avalanches, it will be critical to consider the terrain that lies above you. Traveling in, near, or under avalanche terrain is not recommended today.

  • Loose Wet

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

    Significant rain in the past 24 hours has saturated the upper portion of the snowpack below 8,000’. As a result, wet loose avalanches are possible at the low elevations today. These avalanches could release naturally in steep terrain, or be triggered by a human, and entrain a significant amount of snow as they move. Carefully monitor the wet snow conditions at the low elevations today. Move to low angle terrain if you are sinking deeply into wet, slushy snow.

Avalanche Discussion

After several weeks of dry weather, a powerful and wet storm has created dangerous avalanche conditions in the Tetons. Over a foot of very dense snow (12%) has fallen in the last 24 hours. Winds have been consistently blowing 30 mph or higher out of the southwest with gusts as high as 70 mph. Three day storm totals are nearing 30 inches of snow with over 3 inches of Snow Water Equivalent (SWE). Rain at the lower elevations has compounded the issue and put wet avalanche problems on the table. Warm temperatures, windy conditions, and some additional snow is expected today. Today is a good day to step back, find simple terrain without overhead hazard, and let the mountains adjust to the storm. Avoiding being near or under avalanche terrain is extremely important today.

Numerous avalanches were reported yesterday. See the observations here.

Regioni coperte