Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:16 a.m., Wednesday, February 28, 2007

Tuckerman Ravine has MODERATE and LOW avalanche danger today. The Lip has Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain. All other forecast areas of 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.

I must say, I could really get used to this weather. Sunny mild days with light winds, cold nights and a snowstorm in the future....what more could you ask for? Today's stability ratings are the same as yesterday's with almost all forecast areas posted at Low. The Lip remains the outcast due to the pronounced weak layers I found hiding under hard slab. As mentioned yesterday, these slabs could be pretty difficult to trigger; however, if an avalanche did occur it would be a deep hard slab avalanche. The upper slab in the snowpack has benefited from solar gain over the past few days and it poses little threat of propagating. The only major concern is if the thicker and colder slabs under them were to be disturbed enough to collapse the weak layers underneath. I think it is likely that you could find these facet layers in other locations in the Headwall area. The Lip catches our attention more due to the consistency of the slab and terrain factors such as pitch and shape of the start zone. If you are into looking at snowpacks and weak layers it is a good time to get into Tuckerman Ravine. Overall we have a stable snowpack with a lot of facets scattered around. It is a good opportunity to poke around and see differences in the relationships of layers as the snowpack varies so much.

I made mention of a storm coming our way. At this time it looks like we will be in for a good snowstorm starting on Thursday night and lasting into the evening on Friday. It is still a bit hard to tell how much snow we can expect but it looks like it will be good. If you're from New England you should be wise enough to not get your hopes up yet as things have a habit of changing. Although I try not to get excited, I will admit it is hard not to.

The Lion Head Winter Route is open. This is a steep and challenging route. Crampons, an ice axe, and the ability to properly use this equipment are necessary for safe travel on this route. The Little Headwall has filled in with snow; however, it is quite a thrash to get into and out of the skiable terrain. The John Sherburne Ski Trail is open and has generally good coverage with some scoured sections.

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.

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