Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 7:04 a.m., Monday, March 12, 2007

Tuckerman and Huntington Ravines have LOW avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

The beginning of the spring season each year seems to be marked by the first busy weekend during the month of March. Although it's never a surprise to us it does shock us a bit to see hundreds of people in one day after the lesser numbers of mid winter. Over the weekend mountain travelers divided their use between Tuckerman, Lion Head, and Huntington. Saturday was probably the busiest day all winter in Huntington as over 30 climbers swung tools in the Ravine's steep gullies. Following Saturday's intense warm up at the mid elevations yesterday felt more like winter as the summit hovered around 15F (-9.5C) for the day. WNW winds blew limited new cold snow into Tuckerman creating some isolated pockets in the Lip, under the northern Headwall ice and in the Sluice. Skiers pushed around some new powder before dealing with Saturday's crusty conditions down low. Although not currently much of a stability issue diurnal recrystalization "dried out" the wet snow under the crust overnight on Saturday. This was driven by massive temperature gradients from the cold slabs due to the record breaking cold air from midweek. It was amazing to see this rapid faceting in wet snow under a porous new crust. We will watch this weak layer, but I think it will just be an interesting novelty as warm days and some rain this week will highly affect our snowpack. New precipitation will change stability in the Ravines, particularly rain, but until then we continue to have "Low" avalanche danger in both Ravines with limited isolated pockets of new snow.

The Lion Head Winter Route is open. This is a steep and challenging route. Crampons, an ice axe, and the ability to properly use this equipment are necessary for safe travel on this route. The John Sherburne Ski Trail is open with top to bottom coverage, but expect it to be challenging due to the freeze up.

Please Remember:
•   It is impossible to accurately predict natural events, such as avalanches, in every instance. This Advisory is one tool to help you make your own decisions in avalanche terrain. It should be used along with safe travel techniques, snow stability assessments, an understanding of weather's effect on the snowpack, and proficiency in avalanche rescue.
 
•   You should obtain the latest weather forecast before heading into the mountains. Anticipate a changing avalanche danger when actual weather differs from the National Weather Service forecast.
 
•   For more information, contact the U.S. Forest Service Snow Rangers, the HMC Caretaker at the Harvard Cabin, and the AMC at Pinkham Notch Visitor Center or Hermit Lake Shelters. This advisory will expire at midnight.

Christopher Joosen, Snow Ranger
USDA Forest Service
White Mountain National Forest
(603) 466-2713 TTY (603) 466-2856
 
This is the Official Tuckerman Ravine website.  Occasionally the remoteness of Tuckerman Ravine, weather, or communication problems prevent the website from being updated immediately.  Check the date, and if it is not the most recent, you can also call the National Forest Service's 24 hour avalanche hotline at (603) 466-2713 (ext. 4)

Avalanche Advisory Archives.

United States Avalanche Danger Descriptions.

Échelle Canadienne de risque d’avalanche.

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