Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:29 a.m., Tuesday, January 27, 2004

Tuckerman Ravine has LOW and MODERATE avalanche danger. Hillman's Highway, the Little Headwall, the Lower Snowfields 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 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.

As darkness approached yesterday afternoon the summit temperatures rose above -18C (0 F) and winds began to fade. Currently the summit is checking in at -9C (15 F) with winds 16-31 kph (10-20 mph). There is expected to be little change from these conditions until around midnight when the low begins to slide by us to the south. At that point we may see some snow but today looks to be gorgeous!

How have these conditions affected our snow pack? Until the winds dropped yesterday afternoon they continued to transport snow to lee areas such as SSE and SE-facing slopes and gullies. This has created windslab that is visually detectable by its smooth texture in areas such as the Lip, Sluice and Right Gully. Other areas have had their snow stripped away due to their exposure to these NNW winds. These are recognizable as the areas with rough and shiny surface like the lower left side of the Headwall. Rising temperatures have allowed some sintering and stabilization to occur between layers but time and warmer temperatures are needed to speed this process along. With increasing temperatures we may see the areas posted at Moderate move towards the lower end of their rating by the end of the day.

The John Sherburne ski trail has variable conditions. Expect areas of water ice, hidden 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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