Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 7:57 a.m., Thursday, January 14, 2010

Tuckerman Ravine has Moderate and Low avalanche danger. The Lip has Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steep terrain. All other forecast areas in Tuckerman Ravine 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 LOW avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

Between good weather and generally stable snow, today's conditions for climbing on Mt. Washington will be quite favorable. A high pressure system passing by the region will allow for summit temperatures to reach into the 20s F (-6 to -3C) with wind speeds being on the lighter side of what this mountain typically has in the winter. They are forecasted to be from the WSW and increase during the day, but only to the 25-40mph (40-65kph) range. Snow stability in most locations around the mountain is generally good. There are some areas with a very hard crust layer, one example would be in Hillman's Highway. This is not the place I would take someone to teach them how to use an ice axe and crampons for the first time, nor would I recommend attempting to ski it until things change. Other forecast areas in both ravines have a surface that is primarily an older firm windslab that was deposited with our last significant snowfall. That event happened well over a week ago, and not much has changed over the past couple days. One area that does give me some concern is the Lip. Monday brought under an inch of new snow to the mountain on NW winds, which moved enough snow into the Lip to erase signs of our passage there on Sunday. New loading here has created a patchwork of surface conditions, with the area of concern being the lower portion of the Lip. I don't want to overstate the problem; the slabs developed with the loading here are on the thin side and we feel confident in the stability of the underlying windslab. With that said I do believe the area warrants a Moderate rating today, with human triggered avalanches being possible. All together it looks like a fine day for traveling around the mountain, so have fun and be safe out there.

Looking ahead into the weekend we expect another reasonable day tomorrow with warm temperatures and perhaps a light snowfall late in the day. There is a slight chance of upslope snow showers in the forecast for the weekend. We'll keep you posted here and through the Weekend Update on our website Friday afternoon.

The Lion Head Winter Route is open. It is a steep route and an ice axe and crampons are recommended for safe travel. The Sherburne Ski Trail is in fair shape despite the lack of recent snowfall although some sections are beginning to turn icy.

Please Remember:
•   Natural events such as avalanches are impossible to accurately predict 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 higher summits forecast.
 
•   For more information, contact the U.S. Forest Service Snow Rangers, the AMC at the Pinkham Notch Visitor Center or Hermit Lake Shelters or the HMC caretaker at the Harvard Cabin. A new avalanche advisory will be issued tomorrow and this advisory expires 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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