Boletín de aludes

Central Sierra Nevada

Sierra Avalanche Center
Ver en el mapa

Peligro de aludes

Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
Desactualizado: este boletín caducó 11 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Avalanche danger is LOW for all elevations and aspects. Minor loose wet instabilities are expected during the afternoon hours. Loose wet avalanches large enough to bury or injure a person are unlikely. Normal caution is advised. Sufficient snow cover for avalanche activity on SE-S-SW-W aspects exists only in isolated portions of the forecast area. Much deeper, continuous snow cover exists on NW-N-NE-E aspects.

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    1

    With clear skies overnight and near freezing air temperatures, a decent to strong overnight snow surface refreeze is expected to have occurred due to radiational cooling. As daytime warming progresses, areas of surface wet snow will form on sun exposed slopes. Little to no snow cover remains on the vast majority of SE-S-SW-W aspects. Instability concerns on these aspects are confined to highly localized areas where snow cover actually exists. E aspects continue to hold significant snow cover around the vast majority of the forecast area. Surface wet snow several inches deep will exist on E aspects by this afternoon. Sun angles are still not quite high enough to create large amounts of snow surface melt on NW-N-NE aspects 35 degrees and steeper. As a result, a lesser degree of surface wet snow formation will exist on steep northerly aspects today. With free water drainage well established on all aspects, wet snow instability is expected to be limited to human triggered roller balls and human triggered loose wet sluffs in steep terrain that require a push to set into motion. Loose wet avalanches large enough to bury or injure a person are unlikely today. Keep in mind that terrain traps such as gullies and cliffs below can greatly magnify the consequences of very small avalanches that would otherwise be too small to bury or injure a person.

Avalanche Discussion

Observations made yesterday on Red Vista/Elephant's Hump (Carson Pass area) revealed limited signs of surface wet snow instability in the area at mid day. Recent new snow was capped by melt-freeze crust on N aspects, rapidly assimilating with older melt-freeze crusts on E aspects, and rapidly melting out on SE-S-SW aspects. Snowpit data collected on a N aspect at 8,840' in near treeline terrain yielded no indications of slab instability. Skier triggered roller balls that occurred at noon on an open, sun exposed NE aspect reached 18 inches in diameter before breaking apart. Ski cuts on several steep N-NE-E aspects produced only roller balls and pinwheels, but no loose wet sluffs. Natural roller balls, likely having occurred on Tuesday were visible on the E face of Elephant's Back.

Regiones cubiertas