Lawinenlagebericht

Central Sierra Nevada

Sierra Avalanche Center
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Lawinengefahr

Hochgebirge
1 · Gering
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Veraltet — dieser Lagebericht ist 10 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

The avalanche danger should remain LOW today due to increased cloud cover and winds, slightly cooler temperatures, and a prolonged melt-freeze cycle. Some small loose wet avalanches could still form on isolated terrain features on any aspect where wet snow exists. If the forecasted cloud cover does not materialize, the avalanche danger could rise to MODERATE on sun exposed slopes at all elevations due to loose wet avalanche issues.

Lawinenprobleme

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely
    Größe
    1

    Colder overnight temperatures, increased winds, slightly cooler daytime temperatures, and forecasted cloud cover should all work to limit the wet snow that forms due to daytime warming today. In addition the snowpack has experienced several days of melt-freeze cycles, and even though it has still not fully transitioned to corn snow in many places, those melt-freeze cycles have allowed good drainage channels that prevent free water from pooling in any specific layer to form in the snowpack. Despite all the things working to limit wet snow formation today, some small isolated loose wet snow instabilities like small roller balls, pinwheels, and wet point releases may still form on some isolated terrain features especially on the E-SE-S-SW-W slopes steeper than 35 degrees where drier snow still exists under the wet surface snow. Some areas of wet snow could also form on more northerly aspects. If the forecasted cloud cover does not materialize, loose wet snow instabilities may become more widespread and larger. If more cloud cover and wind occurs, the snow surface may remain mostly frozen in many areas today.

Avalanche Discussion

Yesterday on Rubicon Peak, wet snow existed on the N aspects up to about 8800 ft. Some small roller balls did occur on these aspects but no other signs of instability existed on the northerly aspects. Small human triggered roller balls also occurred in the Deep Creek area due to the presence of wet snow on N aspects. Upper elevation east facing aspects on Rubicon Peak had started to refreeze by 1 pm, and a thin frozen melt-freeze crust existed above drier snow that had not transitioned to corn on these upper elevation east aspects. 

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