Boletín de aludes

Presidential Range

Mount Washington Avalanche Center
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Peligro de aludes

Wed
Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 5 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Human triggered avalanches are unlikely today, limited to isolated areas where recently drifted snow may still be sensitive to a trigger. The larger drifts are most likely to be found in the gullies of the Gulf of Slides, and beneath the ice in Tuckerman Ravine including The Lip & Sluice ski runs. You can easily identify these wind drifted slabs of snow by looking for a smooth, dull surface. Smooth shiny surfaces indicate icy hard snow which presents a sliding fall hazard and are most likely to be found high near ridgelines. Avalanche danger is LOW.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    1

    Very high winds have worked to redistribute this weekend’s snow at mid and upper elevations. Northwest winds in the 70-90 mph range have been consistent since the start of snowfall the evening of March 13th, creating firm wind slabs on aspects in the lee of the NW wind. These firm slabs are going to be stubborn, though don’t rule out the possibility of finding a trigger point such as a thin spot. It’s likely that softer slabs exist in locations protected from the wind at mid elevations. These will be more sensitive to a human trigger though small in size.

Avalanche Discussion

Skies cleared in the afternoon yesterday to reveal the results of many hours of strong wind on the 13” of snow. Obvious patches of icy bed surface reflecting the sun high up in the terrain, and I suspect much of the Alpine Garden and all upper elevations. The wind slabs distributed around the mid elevations are a mix of smooth surface in some locations and pocked with sastrugi texture in others. Eroded avalanche debris was visible near the dog-leg in Hillman’s, and a larger, wider crown line under the ice in Tuckerman Ravine suggests that spot ran a second time over the weekend. Overall, stability concerns are limited to the most recent snow beginning on the 13th, found mostly at mid elevations.

Your avalanche, snowpack, or weather observations are extremely valuable to the forecasters at MWAC. Help create a more accurate avalanche forecast by submitting your observations here. 

Listen to the weekly MWAC Outreach Podcast provided by Ski The Whites. Discussions include snowpack information, weekend outlook, and general avalanche related info. 

Our next free online event is coming up Thursday, March 18 @ 7PM -Women’s Backcountry Talk- A Free Zoom Webinar. Signup is required. 

The Harvard Cabin is open for camping only with no entry allowed inside the cabin. There is no access to the breezeway at HoJos.

Please Remember:

  • Safe travel in avalanche terrain requires training and experience. This forecast is just one tool to help you make your own decisions in avalanche terrain. You control your own risk by choosing where, when, and how you travel.
  • Avalanche danger may change when actual weather differs from the higher summits forecast.

For more information contact the US Forest Service Snow Rangers, AMC visitor services staff at the Pinkham Notch Visitor Center, or the caretakers at Hermit Lake Shelters or seasonally at the Harvard Cabin (generally December 1 through March 31). The Mount Washington Ski Patrol is also available on spring weekends.

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