Bollettino valanghe

Presidential Range

Mount Washington Avalanche Center
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Pericolo valanghe

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

In sintesi

Wet snow avalanches are concerning today as the snowpack continues adjusting to the warmest temperatures of the season. Minimize time spent under large, steep snow slopes and recognize the unpredictable nature of wet avalanches.

Problemi valanghivi

  • Wet Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–2

    What and where is it: Large wet slab avalanches are unlikely but not impossible as melt water continues moving through the snowpack. Multiple crust layers buried deep in the snow could allow melt water to collect and weaken layers of snow deep below the surface. 

    How can you recognize it: Wet, soft snow at the surface is a sign of potentially unstable conditions deeper in the snowpack. Digging into the snow to look for how deeply water has saturated the snow and how that water is interacting with old crust layers can tell you more about the potential for larger, more destructive wet slabs. 

    How can you manage it: Steep snow-covered slopes should be treated with caution today. Wet slabs can have limited warning signs about instabilities below the snow surface. Wet avalanches are challenging to forecast and difficult to manage, so consider keeping terrain choices simple and minimize time spent under large, steep slopes. 

Avalanche Discussion

The middle-elevation snowpack has not had a chance to refreeze for over two days. Temperatures today will climb again towards the 50 degree mark with significant solar radiation.  This creates a lingering concern of large, unpredictable wet slab avalanches as liquid water continues to drain down through the snowpack, encountering old crust layers along the way.Remember that wet slab avalanches are especially hard to predict and the newly wet snowpack after a long, cold winter deserves respect today as it continues to adjust to warm, wet weather. While wet slabs are the most serious concern, do not underestimate triggering a smaller, wet loose avalanche or large wet sluff of loose snow in steep terrain. While this is not likely to bury you, it may be heavy, powerful, and entrain a lot of snow on the way down. Very warm temperatures and melting snow have presented other mountain hazards that should be factored into your decision making. The chance for encountering falling ice, large open holes, and undermined snow exists today. Brush up on your knowledge of springtime mountain hazards and how you could manage them.

OBSERVATIONS: Please consider submitting an observation on our website or in the new Avy phone app of what you are seeing in your travels. Submitting an observation hones your skills, informs other users, and improves our forecasts.

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