Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 9:18 a.m., Wednesday, December 31, 2003

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

Huntington Ravine currently has MODERATE avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible on steep terrain. Use caution in steeper terrain.

The summit picked up 8.4 cm (3.3 in) of new snow in the last 24 hours with high W and WNW winds. Snow changed from heavy and wet to a lighter density as the temperature dropped and was interspersed with periods of small hail and heavily rimed crystals. These conditions have likely created some interesting new windslab over the old surface especially on E and ESE aspects. While snow fell the winds hovered in the 110-130 kph (70-80 mph) range. These strong winds deposited snow lower down into the ravines and we expect to see thicker windslab in the middle to lower sections of slopes and gullies. Winds are forecasted to remain strong today and shift to the NW which will continue to load and crossload other aspects. As this happens you should expect to see SE aspects approach the upper end of their current danger rating.

The John Sherburne ski trail has variable conditions due to the recent changes in temperature and precipitation. Expect variable conditions with areas of ice, some blowouts, abrupt water bars, open holes, and running water.

THE LION HEAD WINTER ROUTE IS OPEN. This is a steep and challenging route. Ice axe, crampons, and the skill to use them well are necessary for safe travel. Remember, it is always easier to go up than come down.

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 before starting out. ****For more information, contact any of the following: U.S. Forest Service Snow Rangers, AMC at the Pinkham Notch Visitor Center, AMC at the Hermit Lake Shelters, HMC at the Harvard Cabin. ****This avalanche 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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