Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:38 a.m., Friday, February 16, 2007

Tuckerman Ravine has HIGH and CONSIDERABLE avalanche danger today. The Bowl, Headwall, and Lip have High avalanche danger. Natural and human triggered avalanches are likely on a variety of slope aspects and angles. Travel in avalanche terrain is not recommended. All other forecast areas have Considerable avalanche danger. Natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain. The Little Headwall is not currently posted due to a lack of snow in this area. The Lower Snowfields are posted as it is in the runout for the Duchess above.

Huntington Ravine has MODERATE avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible on steep open slopes and gullies. Use caution in steeper terrain. The Escape Hatch is not currently posted due to a lack of snow in this area.

Once again another slow trip to Hermit Lake as very high winds continued to re-drift the trail overnight. If the trail is drifted you know the Ravines are also getting there fair share of pillows, whales, and an occasional shark. We have had sustained winds over 100mph (160kph) for about 15 hours. This has, and is, moving a tremendous amount of snow everywhere. In Huntington most gullies are likely scoured, but we are concerned about the amount of storm snow still moving loading in unusual places. In addition to that the approaches are the number one place to watch as winds has sent an enormous volume of snow in the trees and wind protected locales. Another 2-4" (5-10cm) of upslope snow is forecasted as well which will continue to load new snow in Huntington's lower elevations as well as through out Tuckerman. The runouts from slide paths in both Ravines cross one another down low. In Tuckerman there are some areas that continue to have High avalanche danger. Realize if these run average distances for their path debris will run on the floor of the Ravine. If someone wanted to attempt to access "Considerable" forecast areas the easiest route would take them across these "High" rated avalanche paths. Due to very limited visibility safe route finding will be extremely difficult therefore we don't recommend traveling in Tuckerman today.

Winds are expected to stay very high today gusting over 100 mph (160kph) with temperatures slowly rising from -23F(-31C) to -10F(-23C) later this afternoon. This system is pulling in warmer air and diminishing winds, although where we'll end up at the end of the day is still going to be pretty cold and windy.

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 will be quite slow due to drifting in numerous locations particularly in long low angle or flat terrain. The greatest challenge is the varied densities of wind packed slabs. If you've got big fatty boards you're gonna need them. Snowboarders should bring snowshoes and large basketed poles as the long flat sections will leave you helplessly postholing.

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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