General Bulletin for Saturday, November 24, 2018
This information was published 11/24/2018 at 7:00 AM.
If you are planning to take advantage of the warming temperatures Saturday, expect to find firm wind slabs with pockets of softer snow in a few sheltered areas. There is a sugary layer beneath the melt/freeze crust to keep on your radar. This layer may have failed during the most recent avalanche cycle, and could still be a player in the unlikely event you trigger one of the more recent hard slabs. Probe with your ski pole handle or ice axe, dig a pit or do hand shears before committing to a slope. Don’t let the firm nature of the slab lull you into thinking that it can’t avalanche. Remember that the first warming of a cold snowpack, such as we’ll see to some extent on Saturday, can spell trouble as slabs loose strength. Snow will arrive Saturday night and may turn to sleet or rain at Ravine elevations on Sunday. A more significant storm is forecast for Monday and Tuesday. Stay tuned and remember that wind loading can turn a few inches of snow into a thick wind slab in our windy terrain.
Ice climbs are growing in size and pockets of unstable snow between ice pitches are notorious for causing problems. In addition to avalanche hazards, remember to take into account other early season hazards that exist in the terrain:
- Rocks, trees and bushes lurk in the snow and in the fall line. Skiing or sliding into obstacles can ruin your day or worse. New snow may just barely cover a season ending stump or boulder.
- Terrain traps and cliffs make burial and significant injury a real possibility, even if you are only swept off your feet by a small avalanche.
The Winter Lion Head Route is open. This route avoids the avalanche paths that threaten the summer trail and is the most direct route to the summit from the east side. Be advised that all the recent snowfall drifted chest deep near treeline, making snowshoes more than just a good idea on Saturday!
We have received some great snow and avalanche observations from folks in the field. Thanks, and keep them coming!
Safe travel in avalanche terrain requires training and experience. This forecast 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.
Avalanche danger may change when actual weather differs from the higher summits forecast.
For more information contact the US Forest Service Snow Rangers, AMC visitor services staff at the Pinkham Notch Visitor Center, or the caretakers at Hermit Lake Shelters or seasonally at the Harvard Cabin (generally December 1 through March 31). The Mount Washington Ski Patrol is also available on spring weekends.
Posted 11/24/2018 at 7:00 AM.
Frank Carus, Lead Snow Ranger
USDA Forest Service
White Mountain National Forest