Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:45 a.m., Thursday, December 22, 2005

Tuckerman Ravine has MODERATE and LOW avalanche danger. The Lip, Headwall, Bowl, and Right Gully have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain. Hillman's Highway, The Lower Snowfields, The Little Headwall, and Left Gully 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 MODERATE and LOW avalanche danger. Central Gully has Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain. All other forecast areas in Huntington have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely EXCEPT in isolated pockets. Normal caution is advised.

Another .6" (1.5cm) of snow over the past 24 hours brings the 3 day total just shy of 6" (15cm). This snow has been brought in and deposited into E aspects by consistent W and NW winds since the weekend. Poking around in the Ravines yesterday afternoon confirmed the morning ratings, which for the most part are the same today. Avalanche activity in Left Gully and the Chute has created a hard surface bridging any instability below rendering it moot. However, as you go north across Tuckerman the Bowl and Headwall harbor more and more instability culminating with the Lip. This forecast area and it's immediate surroundings currently hold the most unstable slabs in the Ravine. In Huntington the area of most concern is Central Gully, particularly the snowfields between the talus of the Fan and the ice narrows half way up. Some isolated pockets to watch closely under the Low rating exist down low in South and O'Dell's Gully of Huntington Ravine. This is also true of the top climber's right exit of Hillman's in Tuckerman due to the plume of snow loading some new slab in the deposition. Although winds are still a bit stiff and the mercury a little low the mountains should be beautiful under blue skies today. As we have been mentioning over the past several days snow is expected on and off over the next week. These conditions can create instability behind your back as an inch or two a day barely shows up on the radar screen. Pay attention to how these small numbers add up and are transported by the winds of Mount Washington. It is possible some substantial precipitation may come in over the weekend with some warmer air creating the potential for our wonderful New England "Wintry' Mix". We will keep you up to date from day to day in the Avalanche Advisory.

THE LION HEAD SUMMER TRAIL IS CLOSED DUE TO THE AVALANCHE PRONE SLOPES JUST BELOW TREELINE. THE LION HEAD WINTER ROUTE IS OPEN. Mountaineering skills and equipment are required for safe travel on this route.

The Sherburne Ski Trail has top to bottom coverage though it is quite thin in places. Expect rocks and abrupt waterbars along the way.

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 Pinkham Notch Visitor Center or Hermit Lake Shelters or the HMC caretaker at the Harvard Cabin.
 
•   • This avalanche advisory expires 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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