Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:27 a.m., Sunday, January 27, 2008

Tuckerman Ravine has Low, Moderate and Considerable avalanche danger today. 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. The Lower Snowfields, Hillman's Highway, Left Gully and Right Gully have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steep terrain. All other forecast areas in Tuckerman have Considerable avalanche danger. Natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain.

Huntington Ravine has Considerable and Moderate avalanche danger today. Central and South Gully have Considerable avalanche danger. Natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain. All other forecast areas in Huntington have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steep terrain.

Welcome to Utah Day on Mt Washington! In honor of the special occasion we're currently being treated to conditions that are more representative of the Wasatch than the Presidentials. About 3" (7.5cm) of snow has fallen in the last 24 hours at the base of the ravines with a shockingly low density of 3%. In addition to this champagne powder, the summit wind speeds are forecasted to reach only 20mph(32kph) with a shift occurring through the day as winds move from the S through the E and into the NE by darkness. If it were not for some lingering instabilities we'd be jazzed about making fresh tracks in steep terrain. Unfortunately the layers of windslab that were laid down at the end of last week have had little chance for settlement and thus elevated avalanche danger persists today. The areas of most concern are those with strong E aspects such as the Chute through Sluice in Tucks and Central and South Gullies in Huntington. Though many areas are rated at Moderate today you can expect to find a range within this rating. Right Gully and Hillman's Highway just came down from yesterday's rating of Considerable and harbor some suspect snowfields in areas that are otherwise dominated by old surface. In Huntington, Odell, Pinnacle and Yale have more issues than the outlying areas with the same rating such as North, Damnation and Escape Hatch. If you're traveling in steep terrain today keep a close eye on the winds. Should we exceed the forecasted wind speeds you can expect wind transport to pick up and avalanche danger to rise. You probably won't be carrying an anemometer to measure velocities so use you mountain savvy to notice any indications of drifting or blowing snow. If the snow isn't falling straight down your hackles should start to perk up. With the day's weather forecast we're currently most concerned with human triggered avalanches but natural activity is still in the back of our minds. Keep an eye out for anyone who might be above or below you in steep terrain and remember your safe travel rules!

We always recommend bringing crampons and an ice axe and having solid self arrest skills if you plan on traveling in steep terrain, including the Lion Head Winter Route. Under the blanket of new snow many areas have large expanses of bulletproof old surface. We've three accidents in the last three days due to sliding falls that went unarrested on the old surface. What do you say we stop the run of accidents today? The Sherburne Ski Trail is open with good coverage from top to bottom.

Please Remember:
•   It is impossible to accurately predict natural events, such as avalanches, in every instance. This Advisory is one tool to help you make your own decisions in avalanche terrain. It should be used along with safe travel techniques, snow stability assessments, an understanding of weather's effect on the snowpack, and proficiency in avalanche rescue.
 
•   You should obtain the latest weather forecast before heading into the mountains. Anticipate a changing avalanche danger when actual weather differs from the National Weather Service forecast.
 
•   For more information, contact the U.S. Forest Service Snow Rangers, the AMC at Pinkham Notch Visitor Center or Hermit Lake Shelters, or the HMC caretaker at the Harvard Cabin. This 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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