Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 9:21 a.m., Friday, January 2, 2004

Tuckerman Ravine currently has LOW and MODERATE avalanche danger. Hillman's Highway, the Lower Snowfields, the Little Headwall, and Left gully have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised. All other areas 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.

Huntington Ravine currently has LOW avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

The summit picked up another 5 cm (1.9 in) in the past 24 hours which totals 19.5 cm (7.7 in) for the past 3 days. Winds reached 166 kph (100 mph) which scoured many areas in Huntington and some in Tuckerman. However the sheltered lee slopes on the Northern side of Tuckerman did not get as wind effected so consider instability to be more of a concern as you move from the Chute towards the Lip. Snowfields high under the Headwall ice, the Lip, the Sluice, and eastern aspects of Right Gully have examples of new snow instabilities. Realize that areas posted as Low do have isolated pockets of instability. Once again you will find a variety of snow conditions within a relatively small area such as the Bowl. This may all change as the day progresses based on the weather forecast. Snow is likely and 2.5+ cm (1+ in) is expected to begin by midday. As of 8:45 snow began at Hermit Lake and I expect snow totals to exceed expectations before tapering off late in the day making way to clearing skies during the overnight. Winds are light out of the West and are expected to increase to 50-65 kph (30-40 mph) and shift to the SW. Expect an INCREASING AVALANCHE DANGER today as winds load new snow into the Ravines. Anticipate current ratings to move to the upper end of their definitions pushing the next rating. If more snow is receieved than is forecasted expect the potential for many areas to move up one step. I.e. Low to Moderate or from Moderate to Considerable.

Snow, sleet, and rain is forecasted for tomorrow. Water equivalents of 1.25 cm (.5 in) is expected. Anticipate rain on snow associated instabilities. We will cover this tomorrow morning in the new advisory.

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.****

Christopher Joosen, 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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