Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 9:12 a.m., Sunday, February 13, 2005

Tuckerman and Huntington Ravines have HIGH AVALANCHE DANGER. Natural and human triggered avalanches are likely. Unstable slabs are likely on a variety of slope aspects and angles. TRAVEL IN AVALANCHE TERRAIN IS NOT RECOMMENDED. THIS INCLUDES STAYING WELL AWAY FROM AVALANCHE PATH RUN-OUTS. The only exceptions to today's High rating are the Lower Snowfields and Escape Hatch which are rated Considerable. In these areas natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain. The Little Headwall has Moderate avalanche danger today. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain.

I think last week's pleading during the sunny warm weather must have gotten to the right ears because winter is here with some oomph! The Summit picked up another 16.7cm(6.6in) of new snow and Hermit Lake's total over the last four days has climbed to more than 80cm (31.5in). This past day's snow has been much lighter than Thursday's big dump with densities hovering just under 4% in the Ravines. Winds have lightened up as well in the past 24 hours but not enough to stop the new fluffy snow from blowing onto lee slopes. These NW winds are expected to pick back up today and reach 113kph(70mph) by the afternoon when they'll blow our current cloud cover off of the mountain. Higher winds mean tighter packed crystals forming stiffer windslabs over the softer windslab created in the past day. We look forward to the clearing as we have yet to get a good look into either Ravine. What we have seen is a tremendous amount of loading onto the lower slopes with southerly aspects. There's a lot of snow out there and it hasn't stopped moving around yet! Today is one of the most difficult days for folks who'd love to venture into avalanche terrain. As the clouds lift and we're greeted by blue skies the terrain will look more inviting. Don't let the blue skies convince you that the slopes are any more stable than they were when you could only see 50 yards. Avalanches don't care how beautiful the day is or that you've been planning your climb for two months. Use your head!

THE LION HEAD WINTER ROUTE IS OPEN. Mountaineering skills and equipment are required on this route. Crampons and an ice axe are a must for safe travel on Mount Washington. The John Sherburne Ski Trail has variable conditions from hard windslab to icy surfaces.

As always, this advisory is one more tool to help you make your own decisions in avalanche terrain. It should be used along with your own snow stability assessments, knowledge of safe travel techniques, skill in reading mountain weather's effect on the snowpack, and avalanche rescue.

Please Remember:
•   Any new precipitation may increase the avalanche danger, this includes wind transported snow.
 
•   Obtain the latest weather forecast and review archived avalanche advisories at www.tuckerman.org for snowpack history before heading into the mountains.
 
•   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 Harvard Cabin.
 
•   This advisory will expire at midnight.

Justin Preisendorfer, 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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