Bollettino valanghe

Mount Shasta

Mount Shasta Avalanche Center
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Pericolo valanghe

Wed
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Wind and storm slab avalanches are still possible in specific locations, particularly steep unsupported slopes and convex rolls above treeline, areas of shallow snowpack, and heavily wind loaded terrain. Any slopes greater than 35° near and above treeline should be carefully evaluated. 

Problemi valanghivi

  • Storm Slabs

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

    The region has received 15-20" of new snow on average over the past 48 hours. While the snow has generally demonstrated strength and resistance to sliding, we can't rule out storm slabs as a possibility while the widespread, thin facet layer finishes dissipating. Small storm slab avalanches are still possible on specific terrain features, particularly in steep terrain where the snowpack might be thinner. Today's sunny weather will help settle and strengthen the new snow.

    Snowfall of greater than 12" (30cm) in a 24 hour period are a good indicator that storm slab avalanches are possible.

    Photo credit: MSAC Forecaster

  • Wind Slabs

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

    Wind slabs can take several days to heal following a wind event. The new snow over the past several days was accompanied by steady moderate winds. Evidence of wind transported snow has been seen in specific locations along ridgetops near and above treeline, as well as wind-loaded slopes on isolated terrain features. This is enough to keep wind slabs as a possibility in today's forecast. Be sure to carefully evaluate any terrain that may have been wind-loaded the past several days.

    Ridgetop cornices are a good indicator of previous wind-loading of a slope. 

    Photo credit: M. Madden, Above Heart Lake

Avalanche Discussion

Mark your calendars! This Saturday, Dec 10, is the MSAC Movie Night at the Mt. Shasta Community Center. We'll be showing the film "Buried" about the 1982 Alpine Meadows avalanche. The film chronicles the third deadliest avalanche in US history, the miraculous rescue efforts, and the traumas that still haunt the survivors today. Tickets can be purchased at the door. Hope to see you there!

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