Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:33 a.m., Sunday, January 16, 2005

Tuckerman Ravine currently has LOW and MODERATE avalanche danger. The Lower Snowfields, the Little Headwall, Left Gully and Right Gully have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised. Hillman's Highway, The Headwall, Bowl and the Lip have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible. Use caution is steeper terrain

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.

Today's stability concerns are focused on the newer slabs that formed as a front moved out on Friday and deposited 8.5cm (3.3in) of snow. High W through NW winds loaded many areas with at least a bit of slab. The most significant loading appears to have occurred in strong lee areas of NW winds. The top of Hillman's Highway, the Chute, and the Lip picked up the most new snow. The Chute and the Lip are the main reasons for the Bowl and Headwall being at Moderate. Other areas I would mostly consider Low, but realize "Except in isolated pockets" does apply.

Two other concerns exist besides avalanches. Ice climbers need to be aware of ice dams due to the intense amount of running water caused by recent rain. Similar weather events have historically caused ice dams to blow out with climbers on them due to high pressure being released by an ice axe placement or a crampon. The outcome is rarely positive. The other concern is the very hard icy surface that exists in most places. Crampons and an ice axe are a must for safe travel on any angled terrain. With that said self arrest will be very difficult so move slow and methodically.

During our field observations yesterday we observed some common, but not recommended, travel techniques in avalanche terrain. We thought it might be a good chance for us to remind people of the basic travel rules in avalanche terrain. Traveling through suspect terrain one at a time is a standard practice we see ignored all the time. The reason you should travel one at a time is to expose only one person to a specific hazard at a time. Of course, you only send the first person across after you have done your research on the snowpack and performed your favorite stability tests. The hazards involved with traveling together in steep terrain is not limited to avalanche danger. They can include ice fall, rock fall and falling objects due to parties above you (ice, rocks, water bottles, people). Yesterday we observed 9 climbers wandering up Right Gully at once on very hard surface conditions with intermittent pockets of slab. If the top climber fell and failed to self-arrest, we would have had a scene more common in a bowling alley with people getting knocked over and starting their own out of control fall. The "herding" mentality people get into is understandable. We like to be near each other and it feels more secure. We just want to encourage you to be aware of your surroundings and the hazards that exist around you. Once you have properly assessed your situation and the conditions around you, then you can make smart travel decisions.

THE LION HEAD WINTER ROUTE IS OPEN. Mountaineering skills and equipment are required for safe travel on this route. The John Sherburne Ski Trail is challenging due to hard icy conditions. You should expect hazards in the form of turf, rocks, bushes, water ice and deep waterbars.

As always, this advisory is one more tool to help you make your own decisions in avalanche terrain. It should be used along with your own snow stability assessments, knowledge of safe travel techniques, skill in reading mountain weather's effect on the snowpack, and avalanche rescue. To improve these skills take an avalanche course. We have all the avalanche courses offered in and around the Mt. Washington Valley this winter on our website, tuckerman.org.

Please Remember:
•   Any new precipitation may increase the avalanche danger, this includes wind transported snow.
 
•   Obtain the latest weather forecast and review archived avalanche advisories at www.tuckerman.org for snowpack history before heading into the mountains.
 
•   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 Harvard Cabin.
 
•   This advisory will expire 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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