Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:42 a.m., Wednesday, December 14, 2005

Tuckerman Ravine has Moderate and Low avalanche danger today. The Lip and Hillman's Highway 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. All other forecast areas in Tuckerman Ravine have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised. We are not currently forecasting for the Little Headwall or Lower Snowfields due to a lack of snow.

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

The 1.5"(3.25cm) of new snow that was blown around yesterday had a difficult time sticking in the Ravines and left the old, wind sculpted surface showing throughout most of both Ravines. Snow devils are still swirling around in Tuckerman and provide a nice aerial show against the brilliant blue sky. If you are heading into avalanche terrain be aware that strong lee areas did pick up pockets of new wind slab and these should be treated with caution. In most areas they can be easily avoided. One exception to this is the Lip, including the top of the "open book". This area picked up the largest pockets of new snow, which is why it is posted at Moderate today. A savvy traveler could pick their way through here, but solid route finding skills are a must. The other area posted at Moderate is Hillman's Highway. The main concern here is the top right exit. A good size pocket of slab is sitting over the gully and this is currently the only area that is being loaded with wind-blown snow.

Looking ahead, the next chance for precipitation will come on Friday. Right now we are expecting snow during the morning hours with the potential for some accumulation. Right now the models are indicating a dry slot of air will move in and keep our precipitation totals at bay. If any of you know how to shoo off this dry slot, let me know. This storm will approach as the ridge of high pressure that we are enjoying/enduring slides off and allows for warmer air to move in. As a result the coastal areas may see a mix of precipitation and there is a chance we could see some sleet and freezing rain mix in with the precious snow.

As I alluded to above, it is pretty darn cold up here today. Summit highs may reach 0F (-19 C) and winds will be out of the N and NE at 20 to 40 mph (32-65 kph). It is a beautiful day to be traveling above treeline, just make sure you are prepared for arctic conditions. Also remember that many summer trails go through avalanche terrain. Always use safe travel practices and think about snowpack stability not the "trail" underneath.

Don't wait any longer to refresh your avalanche skills. Pull out your beacon, practice, and spend a couple bucks on a fresh set of high quality batteries. Review your safe travel rules, techniques for assessing snow stability, and sign up for an avalanche course. We have all the avalanche courses offered in the Valley this winter on our website, tuckerman.org. Christmas is coming soon, so sign yourself or a loved one up now!

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 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 avalanche advisory expires at midnight.

Brian Johnston, 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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