Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:00 a.m., Tuesday, January 23, 2007

Tuckerman Ravine currently has Moderate and Low avalanche danger. The Lip has Moderate danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible in steep terrain. Use caution in steeper terrain. Hillman's Highway, Left Gully, the Bowl, the Headwall, 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. The Lower Snowfields and Little Headwall are not posted due to a lack of snow in these areas.

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

It is a beautiful morning on the mountain. Snow showers just cleared out and a bright red alpenglow is lighting up the mountain. We can see a couple of point release loose slides have come down in Left Gully, the Chute and Central Gully as a result of 1.7" (4.3 cm) of 11% density new snow that has fallen in the last 24 hours without much wind. These loose snow sluffs have all been small and I suspect similar types of events may occur today. The summit winds are expected to be fairly light today, increasing from 5 to 20 mph (8 to 32 kph) to 15 to 30 mph (24 to 48 kph) with higher gusts this afternoon. Snow showers are also possible today, however, not much accumulation is expected. If you plan on heading into avalanche terrain today you need to pay attention to the wind. As we get into the afternoon we may start seeing some snow move around, particularly if the winds exceed their forecasted speeds. This will be conducive for soft slab development, especially at the tops of gullies. The Lip area is still posted at Moderate due to the possibility of human triggered avalanches in slabs that were deposited over the weekend. As mentioned yesterday, there are a lot of interesting features in the snowpack in the Lip, Sluice and Right Gully that warrant your attention if you plan on traveling in these areas. There is a lot of variability in the snowpack from one place to the next so dig into the snow often rather than betting the farm on one pit.

Winds are going to pick up some more tomorrow and will start to move the new snow into the ravines. Depending on wind speeds and how much snow we squeeze out of the atmosphere between now and then, there could be some stability issues to deal with. Expect increasing avalanche danger tomorrow and check the latest advisory to see what the concerns are. It will also be getting colder with temperatures falling below zero F in the mountains.

The Lion Head Summer Trail is still open. The Summer Trail crosses an avalanche prone slope that has not developed as of yet. The Winter Route is not built for travel without adequate snow cover, so although we are in winter, please help keep the Winter Route in good shape by using the Summer Trail.

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.

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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