Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 7:32 a.m., Sunday, January 10, 2010

Tuckerman Ravine has MODERATE and LOW avalanche danger. Right Gully and the Lip have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain. All other forecast areas of Tuckerman have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

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

A dazzling alpenglow reflecting off the mountain is making for a pleasant start to our day up here. If you plan on heading up here today I am happy for you. The weather will be relatively nice for winter on Mt. Washington and snow conditions are such that there are a number of options for getting around in avalanche terrain so long as you have solid mountaineering skills. There are a number of surface conditions in the Ravines that range from a tilted hockey rink to wind slabs of varying density. Today's snow stability concerns are lingering from our last significant snow fall and subsequent wind loading that occurred a week ago. Time has allowed these wind slabs to settle pretty well and they aren't showing much sign of having an abundance of stored elastic energy which allows slabs to propagate across a slope and avalanche. That being said they are sitting on a very icy surface which is a bit unnerving. The areas posted at Moderate have the largest deposits of wind slab however there are a number of areas posted a Low that have isolated pockets. A couple of folks skied the Sluice yesterday, some people have traveled through Right Gully including us and one person has come down the Lip on his belly. While this traffic does tell us something in favor of stability, it does not eliminate all concern. Today we hope to conduct another investigation to see exactly how well they have settled. As you get out of the wind slabs, watch out! There is a very icy layer that doesn't believe in friction of any kind. The only reasonable way to get around on this surface is with crampons and you better be ready to self arrest in the event you slip. Otherwise you might find yourself in the lift line at Wildcat before you even know what happened. Hillman's Highway and Left Gully are two good examples of where you can find this surface.

Clouds will move into the region later today and snow showers are expected in the mountains over the next couple of days with very little accumulation. That is all that is in the forecast for snow right now so embrace the good climbing conditions while they last and save the powder boards for another day.

The Lion Head Winter Route is open. It is steep and mountaineering skills and equipment are needed to travel safely on this route. The Sherburne Ski Trail is in fair shape despite the lack of recent snowfall; some skiers have reported it as being "fast".

Please Remember:
•   Natural events such as avalanches are impossible to accurately predict 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 higher summits forecast.
 
•   For more information, contact the U.S. Forest Service Snow Rangers, the AMC at the Pinkham Notch Visitor Center or Hermit Lake Shelters or the HMC caretaker at the Harvard Cabin. A new avalanche advisory will be issued tomorrow and this advisory expires at midnight.

Brian Johnston, 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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