Avalanche Advisory for Thursday, 4-11-2013

This advisory expires at midnight Thursday 4-11-2013

Tuckerman and Huntington Ravines have LOW avalanche danger.  Natural and human triggered avalanches are unlikely.

The rain has done its work on our snowpack. Clearing conditions this morning revealed very little new snow from yesterday morning survived the warm temperatures and rainfall of yesterday. The snow currently has a frozen rain crust over loose grains that have yet to freeze solidly. The snow is “punchy” at mid-elevations and off trail in the woods. It is likely much harder where windpacking occurred prior to the rain and warm weather. One thing is for sure, you will not find good soft snow or corn snow for skiing and riding at higher elevations today. Relatively cool temperatures in the mid 20’s F, mostly cloudy skies  and moderate winds from the NW will not allow softening of the snow.  Long sliding falls, ice dams and punching through a thinly covered stream are among the hazards to be aware of today.  Avalanches will return tomorrow as the main threat as the latest nor’Easter impacts us. Expect an elevated avalanche hazard tomorrow and possibly through the weekend as tomorrow’s snowstorm, and then upslope snow over the weekend, impacts the Presidential Range.

Some other things to consider today are: 1. Visibility will vary through the day due to snow showers and summit fog and may keep you from seeing hazards. 2. New holes and the initial slots of developing crevasses.  3. Weak, undermined snow near cliff faces and streams could collapse. Give them a wide berth. 4. Difficult off trail travel requiring floatation such as snowshoes or skis.

The Harvard Cabin is closed for the season.  The only camping permitting on the eastern side of Mount Washington is at Hermit Lake Shelters.

Please Remember:

  • Safe travel in avalanche terrain requires training and experience. This advisory is just one tool to help you make your own decisions in avalanche terrain. You control your own risk by choosing where, when, and how you travel.
  • Anticipate a changing avalanche danger when actual weather differs from the higher summits forecast. For more information contact the Forest Service Snow Rangers, the AMC at the Pinkham Notch Visitor Center, or at Hermit Lake Shelters. Posted 8:00a.m. 4-11-2013. A new advisory will be issued tomorrow.

Frank Carus, Snow Ranger
USDA Forest Service
White Mountain National Forest
(603) 466-2713 TTY (603) 466-2856

2013-04-11 Print friendly