Bollettino valanghe

Newberry

Central Oregon Avalanche Center
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Pericolo valanghe

Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 6 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche activity has been minimal in Newberry Monument, but the presence of persistent weak layers buried in the snowpack means that we can't rule out avalanches completely.  These avalanches could be quite destructive.  The primary culprit is a layer of buried surface hoar that exists on sheltered north facing slopes.  Be wary of these north facing slopes when they are large, steep, and unsupported.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–2.5

    Observers and forecasters continue to find persistent weak layers within the snowpack on sheltered north facing slopes.  The greatest concern is a layer of buried surface hoar down 45 cm. that was buried on Feb. 14.  We haven't seen any avalanches on this layer, but snowpack tests often show results that are consistent with the possibility for avalanches.  While avalanches on this layer are unlikely, they would be quite destructive.

    The other weak layer that we have been watching is a layer of faceted snow from Feb. 8 which is deeper in the snowpack (down 65-75 cm).  This weak layer appears to be gaining strength (rounding).  The majority of stability tests are no longer showing failures on this layer.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    There is a bit of debris out there from last Tuesday's rain.  If we get substantial rain on Saturday afternoon, Wet Loose avalanches will be possible on steep slopes.

Avalanche Discussion

Riding conditions were not ideal on Friday; a thick melt-freeze crust seemed to exist everywhere.  At least it was supportable which made travel easy.  By midday, sunny slopes were melting, and the surface snow was softening.  As Ryan mentioned in his observation, the coverage up in the monument is better than it has been for most of this winter.

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