Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:21 a.m., Saturday, January 28, 2006

Tuckerman Ravine has LOW, MODERATE, and CONSIDERABLE avalanche danger. The Lower Snowfields 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, Left Gully, the Bowl, Headwall and Right Gully have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain. The Lip has Considerable avalanche danger. Natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain. We have temporarily stopped forecasting for the Little Headwall due to a lack of snow but are close to resuming forecasts for this area.

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

High winds are keeping the snowpack interesting in Tuckerman while they scoured Huntington down to old surface in most areas. Many fracture lines that were clearly visible in Tuckerman yesterday are partially or completely buried now. Winds persistently transported snow into Tuckerman through the day yesterday and they are still managing to move some snow in this morning. Expect to find areas posted at Moderate to be on the upper end of that rating today, particularly in Right Gully and the Bowl. These areas have just come down from Considerable and we have concerns about the possibility for human triggered avalanches in these locations. Your best bet for triggering an avalanche today is the Lip. This area picked up a lot of new snow since it avalanched and it looks ready to go again given the right load to tip the balance of stress and strength. Temperatures are forecasted to be quite warm today, with summit temperatures in the mid 20s to lower 30's F (about -4 to -1 C). Summit winds are forecasted to be W and NW 70 to 90 mph (112 to 145 kph) with higher gusts. These temperatures will help the new slabs settle down, particularly on shelterd southern aspects. However, the high winds could keep solar gain at bay and allow the snap to stay in the slabs. With these factors in mind, you can expect the snow to be less stable this morning. While folks heading into Tuckerman will need to contend with snow as a primary hazard, climbers in Huntington will be dealing with the very hard old surface. While some pockets in strong lee areas in Huntington still need to be treated with respect, the hard surface should be in the front of your mind at all times. The reason for this is because self-arrest on this surface is VERY difficult. It makes for good climbing conditions but awful stopping conditions. This surface can be found in other locations outside of Huntington as well so be ready with crampons, an ice axe and solid technique if you plan on traveling on the upper parts of the mountain today.

Yesterday we got out to look at some of the results from the recent avalanche activity. We concluded we had activity in Yale, Damnation, the Sluice, Lip, Bowl, Left Gully and Hillman's Highway. The most impressive of all of these was the Bowl and Lip avalanche that filled in the floor of the Ravine surprisingly well. This avalanche, and possibly the Sluice avalanche, stepped down into older slabs sending a tremendous amount of snow down into the floor of the Ravine. It's about time!

The Lion Head Winter Route is open. Mountaineering skills and equipment are required for safe travel on this route.

The Sherburne Ski Trail is open with varying conditions. In some places new snow is covering long sections of water ice, deep waterbars and water channels that can grab a ski tip very quickly. Increasing winds will likely scour a number of sections exposed to winds.

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 AMC at Pinkham Notch Visitor Center or Hermit Lake Shelters, or the HMC caretaker at the Harvard Cabin. This avalanche 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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