Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 12 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

On slopes steeper than 35 degrees MODERATE avalanche danger may form on the sun exposed E-SE-S-SW-W aspects due to daytime warming. Loose wet snow avalanches will be possible today. Larger slab avalanches remain unlikely, but isolated slab avalanches triggered by the today's warming will not be impossible.

Problemi valanghivi

  • Loose Wet

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

    More widespread loose wet snow instabilities like roller balls, pinwheels, and loose wet snow sluffs should become possible today due to strong April sunshine, clear skies, and temperatures in the upper 40's and low 50's in the mountains. While the light to moderate northerly winds may slow some of the snowpack warming today, they should not represent enough of a cooling force to prevent these instabilities from forming. Most of these loose wet avalanches should remain too small to bury a person, but they could still push a person into an area with other consequences or could become more serious in areas where terrain traps exist. Larger slab avalanches should still remain unlikely today; however, they are not impossible especially on previously wind loaded SE facing aspects that receive large amounts of sunshine today.

Avalanche Discussion

Yesterday on the Fireplug, snowpit data, ski cuts on test slopes, hand pits, and general observations did not reveal any signs of lingering instabilities on the northerly aspects. Consistent cloud cover and cool temperatures prevented any wet snow instabilities from forming in this area on the southerly aspects. Soft snow still remained on north aspects sheltered from the sun. NE, NW, and E aspects that received some sun held breakable crusts on the surface. The more sun exposed slopes facing the southern half of the compass held melt-freeze conditions.

Regioni coperte