Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

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

In sintesi

While significant avalanche activity should remain unlikely today, some small wet snow instabilities are not impossible as the day warms up on isolated terrain features especially in areas where more snow accumulated during the last storm. LOW avalanche danger exists at all elevations.

Problemi valanghivi

  • Loose Wet

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

    Clear skies, continued cooling by ENE winds, and near-freezing temperatures should have allowed most of yesterday's wet snow to refreeze overnight. As soon as the sun hits the slopes today, this refrozen snow will start to soften. Wet surface snow will form first on E-SE aspects then progress to S-SW-W aspects as the day warms up. The recent snow will be most sensitive to warming since it has not been through as many melt-freeze cycles. In most places, limited amounts of recent snow exist on these aspects so wet snow instabilities should remain small with roller balls or pinwheels predominating. In areas north of Tahoe City along the Sierra Crest where more recent snow accumulated, a small sluff of loose wet snow is not impossible on an isolated near or below treeline terrain feature. At upper elevations, cool NE winds should help limit the amount of wet surface snow formation.

    Finishing backcountry travel in time for a lunch date or going to shaded northerly aspects to search for lingering pockets of cold snow will help find better snow and will limit potential exposure to an isolated and unlikely but not impossible loose wet avalanche. Watch for changing snow conditions as the day warms up and travel using normal caution in the backcountry.

Avalanche Discussion

* Yesterday observations on Castle Peak and in the Ophir Creek area revealed variable conditions on northerly aspects with breakable crusts, firm scoured surfaces, wet sticky snow, and some cold soft snow. The cold soft snow existed on sheltered upper elevation slopes facing due north.

* Observers reported soft wet surface snow and small wet snow instabilities that did not progress beyond a few small roller balls, pinwheels, and one very small wet snow sluff on Castle Peak yesterday.

Regioni coperte