Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 9:35 a.m., Sunday, January 2, 2005

Tuckerman Ravine has LOW and MODERATE avalanche danger. The Lip has Moderate avalanche danger today. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible in steep terrain. Use caution in steeper terrain. All other areas in Tuckerman Ravine have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely EXCEPT IN ISOLATED POCKETS. Normal caution is advised. These pockets do exist so evaluate conditions as you travel from one location to another.

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.

It's a beautiful morning here on Mt. Washington!! We'll take advantage of it while it's here because a wintry mix is heading our way from the west. Precipitation is expected to reach the mountains of NH sometime between late morning and early afternoon. This shouldn't impact snow stability today until late in the day. Keep a close eye on new loading particularly if you plan on being out late. Winds are expected to be out of the west and increase to 65-95kph (40-60mph). Until then what do we have out there now? Well, it's a mix of hard crust with developing facets and pockets of new snow. I found facets under the thick strong surface crust this morning that have grown rapidly due to strong temperature gradients. Forms are upwards of 2mm in size and should continue to grow, but will likely slow due to cloud cover and mixed periods of warmer air through the week. We will watch them with interest, but they are not currently causing a stability problem. Pockets of new snow developed from yesterday's brief shot of precipitation with high W and WNW winds through most of the day. Some primary examples of new pockets can be found above the Headwall, over to the Sluice and locations in Right Gully cross loaded by west winds. The areas of most concern are above, below and in the Lip,

A crust is once again making travel on the mountain slick. Mountaineers should be aware of the potential for long sliding falls to occur on steep terrain if self-arrest is not achieved quickly. The crust conditions are also slippery under thin new snow cover. All visitors travelling on angled terrain should be prepared with crampons and an ice axe.

THE LION HEAD WINTER ROUTE IS OPEN. Mountaineering skills and equipment are required for safe travel on this route.

The John Sherburne Ski Trail will become very hard through the day so expect challenging conditions. Razor sharp edges would be beneficial. Turf is beginning to peek out in addition to some rocks, bushes, 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.

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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