Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:20 a.m., Wednesday, January 3, 2007

Tuckerman Ravine has Moderate and Low avalanche danger. The Lip has Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible in steep terrain. Use caution in steeper terrain. The Bowl, 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. Hillman's Highway, the Lower Snowfields, the Little Headwall, and Right Gully have little to no snow in them so the 5 Scale danger rating does not pertain to these areas. Forecasts for these locations will begin when needed.

Huntington Ravine is still under a General Avalanche Advisory. A General Advisory is issued when instabilities are isolated within the entire forecast area. However it's important to realize that avalanche activity may occur within these locations before the issuance of a 5-scale forecast. This is a critical fact to remember. Under a General Advisory you need to make your own avalanche stability assessments before venturing into any open slopes.

High pressure has brought clearing conditions to the mountains and it is a beautiful day to be out. Yesterday's weather brought very high winds to the mountains and the Summit had a peak wind gust of 114 mph (184 kph) out of the NW. Over the past 24 hours Hermit Lake has recorded 2.8" (7 cm) of new snow and the Summit recorded 2.7" (6.8 cm). High water contents were also recorded with this indicating high density snow or some margin of error in snow total due to the high winds. Regardless, the Bowl picked up some new snow and had some recent avalanche activity. A fracture line is visible in the Chute while high winds and drifting snow may have masked other fracture lines around the Ravine. This leaves us with lingering stability issues in very strong lee areas, most notably in the Lip and Sluice. While the threat of natural avalanche activity has subsided, I would still be concerned about the possibility of you triggering a slide in these areas. As you head south in the Bowl, wind scouring has made the stability issues more isolated so good route finding skills should keep you out of trouble there. If you don't bother paying attention to the pockets of winds slab that were more sheltered from the high winds, you may still be able to find pockets of unstable snow in the Bowl and Chute that could ruin your day.

High pressure will remain in place for the next couple of days with steady NW and W winds. The next weather maker will be arriving during the weekend and it looks like it will bring more mixed precipitation to the mountains.

By now you should have refreshed your avalanche skills, installed some fresh high quality alkaline batteries in your avalanche beacon, and mastered its use. Don't forget your safe travel rules, techniques for assessing snow stability, and sign up for an avalanche course. Avalanche courses offered in the valley this winter are now on our website, tuckerman.org.

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.

Back to the Tuckerman Ravine Home Page

EíLE>