Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:10 a.m., Wednesday, December 26, 2007

Tuckerman and Huntington Ravine have LOW avalanche danger today. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

I'm unsure of what I'm most thankful for this holiday season. It might be the fact that I have about 330 more days before I hear Jingle Bell Rock on the radio, but more likely it's how well the mountain withstood the Sunday's downpour. In general, it's been a quiet time up here since everything froze in place following the rain. Today's weather will be remarkable mild, as far as winter in the Presidential Range goes. We'll have clear skies and calm winds for the better part of the day. As Brian noted yesterday, the Summit has recorded a bit of new snow, which has been blown into strong lee areas. While in most locations this is just a thin veneer of snow, if you find yourself in deeper pockets your avalanche alarms should have its bells and buzzers sounding off. The most likely place to find this is in the Lip. I don't want to overstate the hazard-it is what we would consider an "isolated pocket", which fits the definition of Low-but it is one place to watch out for. As for climbing anywhere on Mt. Washington today, crampons and an ice axe are essential equipment. A sliding fall on angled terrain would result in a quick battle between gravity and your self-arrest skills. You'll need to arrest the fall quite quickly, before you have a chance to accelerate. In Huntington the potential still remains for ice dams to release under the impact of an axe, kick of a crampon, or placement of a screw. This hazard diminishes with time as the water pressure is naturally relieved. So while the likelihood of this happening is on the decline, it's still worth paying attention to.

We've been trying to get a handle on the weather that will be coming up in the next several days. The best we can gather is that there are a few fast moving systems heading our way. Weather models are in disagreement, and it seems as though even our most reliable sources are left guessing at which model's predictions will actually play out. We do have the potential for more new snow in upcoming days, although timing, quantities, and even (gulp) precipitation types are uncertain. If you're planning a trip for the between-holidays time, be prepared for anything, pay attention to the weather, and stay flexible in your plans.

The John Sherburne Ski Trail is open with continuous snow from top to bottom. Expect hard icy conditions. THE LION HEAD WINTER ROUTE IS OPEN. This is a steep and challenging route for mountaineers. Crampons, an ice axe and the ability to properly use this equipment are recommended for safe travel on this route.

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 or the AMC at Pinkham Notch Visitor Center or Hermit Lake Shelters or the HMC caretaker at the Harvard Cabin. This advisory will expire at midnight.

Jeff Lane, 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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