Forest Order Closure in effect. Subject to penalty – CFR 12-63
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The summer Lion Head Trail remains a preferred east side route to the summit over the Tuckerman and Huntington Ravine Trails, though watch for our recommendation towards the Winter Route that will come with additional snowpack development.
As those who attended ESAW and recent MWAC outreach events have heard, our forecast zones are changing this year. The primary drivers of this change are changing use patterns, a desire to be consist with the use of North American avalanche danger scale (and other forecast center messaging), and a desire to provide information to folks venturing into other aspects and elevations around the area. Beginning this year, we will provide an avalanche forecast for most of the Northern Presidential Range.
Fellow avalanche forecaster Julie Leblanc comes to us from north of the border and Avalanche Quebec. Serving the Chic-Choc Mountains of Quebec’s Gaspe Peninsula, Avalanche Quebec is the only avalanche center in eastern Canada. For those counting, that makes two in eastern North America when combined with the Mount Washington Avalanche Center.
We’re happy to introduce Dr. Elizabeth Burakowski, coming to ESAW from the University of New Hampshire’s Earth Systems Research Center and Institute for the study of Earth, Oceans, and Space. She will enlighten us on one of her primary projects, Citizen Science Snow Observations. Dr. Burakowski is a climate scientist who uses climate modeling, remote sensing, and ground observations to investigate the interactions among land cover, land use, climate, and society. Accordingly, Liz will also help us understand regional impacts of climate change.
From nearby Lyme, NH, we are pleased to welcome Sam Colbeck back to the Eastern Snow and Avalanche Workshop. Sam is an Emeritus Researcher and former Senior Research Scientist at the U.S. Army Corps of Engineers Cold Regions Research and Engineering Laboratory (CRREL) in Hanover NH.
We are pleased to introduce Brian Lazar, the Deputy Director of the Colorado Avalanche Information Center since 2010. Brian has been working in the field of snow and avalanches for the last couple decades. He began backcountry skiing in Colorado as a college student, soon becoming a mountain guide and avalanche course instructor.
This is the final bulletin issued by the Mount Washington Avalanche Center for the 2017-18 season. It will remain in effect until complete melt out. Travel in the backcountry requires careful snow evaluation and mountain sense. Hazards due to snow and ice will persist until both are all gone. Summer snowstorms on Mount Washington are uncommon, but not unheard of. If venturing into the mountains, be sure to use all available resources to help plan your trip and make safe travel decisions.
Annual spring snow melt creates significant glide cracks, or crevasses, and undermined snow in the Lip area of Tuckerman Ravine. We close a section of the Tuckerman Ravine Trail where it passes through the Lip as a safety measure. This relatively short section stretches from Lunch Rocks in the Ravine to the junction with the […]
Due to open glide cracks and undermined snow, the Tuckerman Ravine Trail is now closed in the Ravine between Lunch Rocks and its junction with the Alpine Garden Trail. This closure includes the Lip area, which presents numerous hazards to the recreating public and potential rescuers alike.
We are no longer issuing daily avalanche advisories for Tuckerman Ravine this season. We will continue to provide snowpack and weather information as conditions change. We are no longer monitoring conditions in Huntington Ravine, but similar hazards will persist there until snow and ice is gone. Temperatures at night will dip below freezing with daytimes […]
Cool weather will give way to an approaching warm front, though temperatures should remain somewhat cold through the weekend. The summit is forecast to remain below freezing today. Intermittent and partial cloud cover is forecast to continue through tomorrow. Saturday will also bring a chance of rain showers as temperatures warm by a few degrees. Wind today will gust to 90 mph but diminish by afternoon. Warming temperatures on Sunday may allow loose wet sluffing to again become a concern, but until then, the potential for icy refrozen snow makes long sliding falls a primary hazard. Cloud cover and a chance of showers makes Saturday not ideal for skiing. Sunday looks like a sunny day with soft snow. Glide cracks continue to grow and will soon result in closure of the Lip area.
High pressure will build into the region from Canada on Monday, keeping clear conditions until late in the week. Temperatures during the days will reach into the 40sF and nighttime lows will drop into the 30sF. Low pressure will move into the area late in the week bringing unsettled weather. Our springtime isothermal snowpack has generally reduced avalanche concerns to sluff management in steep terrain.
Rain and possibly thunderstorms on Friday will set up a clearing pattern for Saturday. Temperatures close to the freezing mark to start Saturday combined with wind speeds over 100mph on the summit may make a late start the right choice as winds may drop to a more reasonable speed later in the afternoon. Rain on Sunday will be followed by what looks like a good corn cycle next week with sunny skies, warm days and colder nights. An isothermal snowpack has reduced the concerns for large avalanches, though history has shown that intense periods of heavy rain can make the waterfall hole in the Lip do strange things no matter what the snowpack is. Sluff management should be a priority for skiers, in particular the first several of the day on each slope.
This past weekend was a perfect reminder of how fickle spring weather can be. Saturday’s crowds were delighted by sunshine and abundant spring snow while those who ventured up to the Ravines on Sunday found rain and sleet at mid elevations and 11.1” of new snow on the summit. With light and variable winds, this snow likely blanketed higher terrain. Lingering instability in the atmosphere Monday will keep temperatures around the freezing mark for another 1-3” of snow and sleet on the summit. Building high pressure on Tuesday will create a clearing trend into Wednesday along with increasing wind speeds and temperatures. New snow from Sunday will experience rapid warming over the forecast period. Those venturing into avalanche terrain should be aware of the potential for wet avalanches. While wet-loose sluffs may be slow moving, this sort of “push avalanche” can easily take a skier over a cliff or into a glide crack. New snow will also cover developing holes in the snowpack, making safe navigation that much more difficult.
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INCIDENTS & ACCIDENTS
The Mount Washington Avalanche Center is a partnership between the White Mountain National Forest, White Mountain Avalanche Education Foundation and Friends of Tuckerman Ravine and other community organizations. The avalanche forecast applies only to backcountry areas, not operating ski areas, and describes general avalanche conditions which vary locally. The avalanche information provided is the sole responsibility of the USDA Forest Service.