Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 9:15 a.m., Tuesday, December 13, 2005

Tuckerman and Huntington Ravines will have Moderate avalanche danger today. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible in steep terrain. Use caution in steeper terrain. The only exception to this Moderate rating is the Escape Hatch, which has Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised. We are not currently forecasting for the Little Headwall or Lower Snowfields in Tuckerman Ravine due to a lack of snow.

Cloudless blue skies and a uniform blanket of new snow make the mountain look especially stunning today. The real stun however, will come when the winds pick up this afternoon. The 1.5"(3.25cm) of new snow covering the mountain will go airborne after falling under essentially calm conditions during the last 24 hours. You should know that this snow is no ordinary snow. This is the super light density snow that Utah powder snobs dream of. Unfortunately an inch and a half isn't enough to carve turns in considering our current base. But not only is it great for skiing, it's great for transport as even light winds have little problem relocating it. Winds have already begun to move to the NW and are expected to climb to 25-45mph(40-72kph) by this afternoon. Currently most of our forecast areas are at Low but they will be climbing into Moderate as winds ramp up. With today's clear skies you should be able to visually detect when transport begins. Snow blowing into start zones=bad news for stability. If winds stay constant at the top end of their forecasted speeds we may even see the areas in the direct lee approach the Considerable rating and natural activity will become more of a concern.

Even more of a hazard for most folks today is our weather. I know I said earlier how beautiful it was but I'm saying this from inside the cabin after spending a few hours outside this morning. Temps are brutally cold and falling rapidly. The Summit went from 0F(-18C) at 4am to -7F(-22C) by 7am. That's cold without the wind but add in a 40mph(64kph) headwind this afternoon and then tell me how beautiful it is! Can you say frostbite? Visitors must prepare for artcic conditions today that will be getting more severe as the day goes on. My advice- brew a strong cup of coffee and hang tough on the couch with a good book. I suggest something on the topic of faceting in the snowpack as we'll be watching what these cold temps do to our snowpack over the next couple of days. Stay tuned for more info in the days to come.

As mentioned, some areas still have the old raincrust showing. It's more stable than the fresh new snow but it should also be recognized as a potential hazard for travelers on the mountain. These slopes are very icy and crampons and an ice axe are essential for travel on open terrain of any steepness. Self arrest will only be effective if executed immediately, otherwise speed and the snow density may make attempts futile. Also remember that many summer trails go through avalanche terrain. Always use safe travel practices and think about snowpack stability not the "trail" underneath.

Don't wait any longer to refresh your avalanche skills. Pull out your beacon, practice, and spend a couple bucks on a fresh set of high quality batteries. Review your safe travel rules, techniques for assessing snow stability, and sign up for an avalanche course. We have all the avalanche courses offered in the Valley this winter on our website, tuckerman.org. Christmas is coming soon, so sign yourself or a loved one up now!

Please Remember:
•   • Any new precipitation may increase the avalanche danger, this includes wind transported snow.
 
•   • Obtain the latest weather forecast before starting out.
 
•   • 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 avalanche advisory expires 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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