Bollettino valanghe

West Slopes Central

Northwest Avalanche Center
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Pericolo valanghe

Fri
Alta quota
2 · Moderato
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato
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In sintesi

Freezing levels are increasing to 9000ft on Thursday, and an increase in wet avalanche activity is expected at mid to lower elevations where it is warmer. Pay close attention to snow conditions as you travel, noting whether you’re sinking into wet, loose snow more than a couple inches. Continuously search for rollerballs and avalanches naturally occurring near you, and if any of these signs exist retreat to low angle terrain, shady aspects or hastily return to your vehicle.  

Problemi valanghivi

  • Loose Wet

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

    A combination of less of an overnight freeze and wind, and warmer temperatures at mid to lower elevations is enough of a concern to elevate the avalanche danger to Considerable. Wet loose avalanches in those areas may gouge deeper into the snowpack rather than just the surface snow, creating larger avalanches. Conditions will vary extensively based on your aspect and elevation.  Early in the morning only easterly slopes may be affected, but as the day progresses and sun rises higher in the sky a much larger span of terrain could be affected. Upper elevation direct north slopes are probably still managing to hang onto cold dry snow. 

    Uncertainty exists as to when a larger avalanche cycle will happen, but now several days into this warming trend, we expect to see a spike in the amount and size of avalanches soon. As you travel keep close tabs on the changing snow conditions. Keep your return routes in mind - slopes you crossed safely early in the day may become wet, weak, and dangerous by afternoon. Don’t wait until it’s too late and avalanches start coming down all around you that you decide it’s time to retreat. When you start seeing signs of a weakening snowpack such as easily punching down several inches, or noticing any nearby avalanches, leave the area for lower angle terrain or firmer snow.

    A large wet loose avalanche starting near a rock band, similar to what you might see on Thursday.

Avalanche Discussion

Cornices are ripe for failure so stand far back from the edges, and limit your time on slopes beneath them. Shedding on and beneath large features is happening more as temperatures increase, so travel judiciously in mellower terrain beneath areas with large overhead hazards. Expect glide avalanche activity to increase as the spring thaw progresses. Keep an eye out for gaping cracks on steep slopes. Move very quickly off slopes beneath the glide cracks. 

There is a chance that small reactive wind slabs from Monday night’s strong winds may still exist on shady upper elevation slopes. If you are in an area with terrain traps such as a cliff band beneath you, stay alert for the possibility of triggering an avalanche which could take you for a dangerous ride. 

Daily avalanche forecasts will end on Sunday April 18th.

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

Regioni coperte