Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:45 a.m., Sunday, December 28, 2003

Tuckerman Ravine has LOW and MODERATE avalanche danger. Hillmans 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. These pockets do exist. Normal caution is advised. All other areas in Tuckerman have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are POSSIBLE on steep terrain. Use caution on steeper terrain.

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

Realize that in both Tuckerman and Huntington Ravines Low avalanche danger DOES NOT mean none. Isolated pockets DO EXIST.

It's a beautiful morning in the mountains today with clear skies and warm temperatures. The higher summits should get above 4.5 C (40 degrees F) today which will continue stabilizing slabs brought in by Thursday and Friday's new snow. However, due to low ridge top winds around 32 to 48 kph (20-30 mph), and warm temperatures, sheltered southern aspects will gain a tremendous amount of heat today. As the day begins these aspects will begin stabilizing as slab elasticity diminishes removing propagation potential. As areas cook due to solar gain slabs will move from stabilizing to becoming unstable. Rapid temperature change can be difficult for the snowpack to accept and will be a major factor in the slab stress-strength relationship today. So..., southern aspects will move to the upper end of their posted rating as the day progresses. This would push the northern gullies in Huntington close to Moderate and close to Considerable on Tuckerman's southerly aspects. Our main concerns today are related to natural loose point release activity. In addition to human traffic the potential for falling ice triggering some of these pockets will rise through the day. Expect the potential for falling ice over the next few warm days culminating on Monday night and Tuesday due to forecasted rain.

Yesterday was the first clear opportunity to see Thursday-Friday's storm results. We had avalanche activity in Left Gully, Chute Variation, the Chute, The Bowl, Chicken Rock Gully next to Lunch Rocks, the Sluice, as well as Central and Damnation Gullies in Huntington. Tuckerman is currently an interesting place to see multiple debris fields and fracture lines.

The John Sherburne ski trail has variable conditions due to the recent changes in temperature and precipitation. Expect new snow over 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 is 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.

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