Boletín de aludes

Tetons

Bridger-Teton Avalanche Center
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Peligro de aludes

Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 9 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Over the past three days, two to four inches of new snow has fallen every 24 hour period. At times, ridgetop winds have been strong enough to transport this snowfall and form wind slabs in leeward terrain. This slow loading event is balancing out with the snowpack’s inherent ability to stabilize over time. At the mid and upper elevations, skiers and riders venturing into steep, avalanche-prone terrain could trigger small to large wind slabs. Avoid slopes that have obvious signs of wind loading. The snowpack is mostly stable at the lower elevations and avalanches are unlikely.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    Over the past two days, moderate to strong southwesterly to westerly ridgetop winds have formed pockets of wind slab in leeward terrain above 7,500 feet. At the higher elevations, backcountry travelers could trigger these slabs to depth of 6 to 18 inches on steep, avalanche-prone slopes. The likelihood of triggering these slides will decrease with a drop in elevation where the snowpack has been less impacted by the wind. Crusts, areas of mildly facet snow and density breaks below the recent snowfall present other opportunities for slab failure. While failure on these layers is less likely, avalanches involving these deeper weaknesses could add an additional foot or two to slab depths. When evaluating the snowpack, determine the degree to which the recent snowfall is bonding to sun and rain crusts, and examine the potential for collapse on density breaks and faceted snow. Avalanche activity below the rain crust from early February is unlikely.

Avalanche Discussion

On Monday, expect mostly cloudy to overcast skies and periods of light to moderate snowfall as the flow aloft backs to the southwest. Overnight lows in the mountains will be in the single digits before rising into the low to mid teens in the afternoon. Southwesterly ridgetop winds will range from 15 to 25 miles per hour.The general avalanche hazard is expected to be MODERATE on Monday. Above 9,000 feet, skiers and riders could trigger recently formed wind slabs one to two feet in depth when entering steep, avalanche-prone terrain that has obvious signs of wind loading. Below 9,000 feet, the threat of these slides quickly diminishes as the amount of wind effect decreases with a drop in elevation. On sunlit aspects, evaluate the degree to which the recent snowfall is bonding to sun crusts, and on shaded slopes look for density breaks and buried layers of near surface facets.

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