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 7 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Enough warming should occur for many sun-exposed slopes to soften today, but it should not get warm enough for significant wet loose instabilities to form. Some slopes may remain firm and challenging to recreate on. LOW avalanche danger exists with normal caution advised.

Problemi valanghivi

  • Cornices

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

    Clear skies and cool overnight temperatures should have allowed the snowpack to refreeze. As the day warms up, the firm refrozen surfaces should soften starting with the sun-exposed E-SE aspects and progressing to the S-SW-W aspects throughout the day. Wind-sheltered mid to lower elevations slopes should experience the most warming while more exposed upper elevation slopes will take longer to soften. In some places, these upper elevation areas may remain firm for most of the day.  A strong overnight refreeze, moderately warm daytime highs, and some light winds today should help limit the amount of wet snow that forms. Significant loose wet avalanche activity should remain unlikely today.

    Widespread firm surfaces and breakable crusts have resulted in variable and challenging backcountry conditions with the potential for long sliding falls and/or collisions with exposed obstacles. Careful timing that allows soft corn snow to form on sun-exposed slopes and terrain selection that matches your group's skills and equipment can make backcountry travel more fun and safer.

Avalanche Discussion

* Spring melt-freeze conditions exist on sun-exposed E-SE-S-SW-W aspects. These slopes are firm in the morning and have been softening during the day in response to sun and warming.

* On colder NW-N-NE aspects mostly firm surfaces exist in exposed near and above treeline areas. In more sheltered areas a mix of breakable crusts, firm surfaces, and a few isolated areas of softer faceted surface snow exists.

Regioni coperte