Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:00 a.m., Tuesday, February 3, 2004

Tuckerman Ravine has LOW and MODERATE avalanche danger. Hillman's Highway, the Little Headwall, the Lower Snowfields, Left Gully and Right 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 in Tuckerman Ravine have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible in steep terrain. Use caution in steeper terrain.

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

Mild temperatures dominated the summit yesterday with the maximum recorded at -1C (30 F). Accompanying winds were light to nonexistent which produced conditions favorable for strengthening of our snowpack. As today's sun rises we're getting ready for a weathermaker which is expected to provide us with some precipitation late in the day. Total accumulations should reach 15 cm (6 in) but we can always hope for more. The fantastic news about this storm is that temperatures are supposed to fall as time goes on which will most likely mean a decrease in snow density over time. This progression is generally better for stability as compared to when a heavy slab of dense snow is laid down over a layer of light and fluffy powder. Also, the heavy snow will better stick to exposed ice and the various crusts found around the ravines.

As snow or other types of precipitation begin to fly we will see an increase in avalanche danger. The heavier it falls the more rapid the rise in danger. Winds are forecasted to increase in intensity as well which will form windslab in lee areas. They will begin blowing out of the south and eventually wrap around to the northwest effectively loading most aspects. We will be closely watching the areas currently posted at Moderate. These areas have shown substantial avalanche activity during the past month often failing on a deeply buried rain crust. If and when the stress outweighs the strength in newly deposited slabs, we may see avalanches step down to this weak layer producing some spectacular results. Better to see the pictures on the web then witness them firsthand!

The John Sherburne ski trail has variable conditions. Expect areas of water ice, emerging rocks and abrupt water bars. Be prepared for sudden changes in the trail.

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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