Boletín de aludes

West Slopes North

Northwest Avalanche Center
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Peligro de aludes

Fri
Alta montaña
2 · Moderado
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Desactualizado: este boletín caducó 5 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Wet loose avalanche danger is increasing as temperatures rise, especially at 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.  

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2

    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 wet loose avalanche which was seen on Tuesday on the approach to Mt Ann. West facing, 5000ft.

Avalanche Discussion

An impressive avalanche occurred Tuesday afternoon on the Hanging Glacier on Mt Shuksan, affecting much of the valley below. 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. Cornices are also ripe for failure so stand far back from the edges, and limit your time on slopes beneath them. 

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.

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