Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:47 a.m., Tuesday, February 12, 2008

Tuckerman Ravine has Considerable, Moderate, and Low avalanche danger today. The Lip has Considerable avalanche danger. Natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain. The Headwall, Bowl, Right Gully, Hillman's Highway, and Little Headwall have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steep terrain. Left Gully and the Lower Snowfields 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 today. Natural avalanches are very unlikely and human triggered avalanches unlikely EXCEPT in isolated pockets. Normal caution is advised.

Wow, if you're the type of person who likes to be in the mountains on a cold sunny day observing remnants of impressive avalanche activity, get up here soon. It's bright and sunny now, but conditions will soon change with yet another winter storm on its way for tonight. I, for one, am the type of person who enjoys days like this, and believe me, this is an impressive morning to be here. We've just gone through a strong avalanche cycle, brought on by gusty winds and lots of snow available for transport after a few relatively minor snowfalls. Natural avalanche activity took place in several locations that might not be where you'd think to look for it, for example the Lion Head Summer Trail, in the trees off the Boott Spur Ridge, and a faint gully on the ridge east of the Escape Hatch. In addition, most of the usual runners ran, and some of them went big. The Escape Hatch is just one example of where we're seeing broken trees from a large slide. I know what happened yesterday isn't as important for those heading up today as what today's conditions are, but my point in talking about the nature of this past cycle is to get you to recalibrate your minds around what is or is not avalanche terrain on Mt. Washington, as well as on other mountains in the area. Even small slides in seemingly benign slopes can cause you trouble, so travel cautiously wherever you are.

For today, Huntington Ravine is rated Low largely due to scouring and hammering by the strong winds. Currently, winds have been diminishing, though we are still seeing some wind loading taking place on SW and W aspects. With this in mind, you may find isolated pockets of unstable snow in some locations of Huntington. The top of Central Gully is one place where you may find this issue. For the most part, travel around Huntington will be straightforward, be don't be lulled into complacency today. In Tuckerman, we've got more of a mixed bag of conditions. The Lip, Headwall, and Sluice areas are the greatest concern today. Avalanche activity did occur here, but most of the fracture lines have reloaded with additional snow. This newest snow came in cold and with slightly lesser wind speeds, so it will have plenty of elastic energy and snap, so I'd expect any fracture here to propagate a good distance and bring down a lot of snow with it. Hillman's Highway is predominantly scoured; its Moderate rating is due to wind loading in the upper reaches on the climber's right side. Regular readers of the advisory might be surprised to see the Little Headwall rating Moderate while the Lower Snowfields are Low. Strong winds have carried a good amount of snow down to the Little Headwall, but the Lower Snowfields have been hammered by wind and avalanches pouring out of the Duchess. Finally, Left Gully has conditions similar to Huntington, with scouring bringing the danger rating down to Low. It's worth noting though that in order to get to Left Gully you'll be passing through the runout of multiple slide paths. If you're out and about near avalanche terrain today, keep your heads up and your avalanche eyes open. We do have another winter storm coming tonight and tomorrow. It looks like there will be a significant amount of moisture associated with the storm. Expect danger ratings to be elevated once again tomorrow.

As always, crampons, an ice axe, and solid self arrest skills are recommended for travel in steep terrain. This includes the Lion Head Winter Route. The Sherburne Ski Trail is open with full coverage including some wind scoured sections and some wind-drifted 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 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.

Back to the Tuckerman Ravine Home Page