| Posted: 8:21 a.m., Saturday, January 28, 2006 |
Huntington Ravine has LOW avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets.
High winds are keeping the snowpack interesting in Tuckerman while they scoured Huntington down to old surface in most areas. Many fracture lines that were clearly visible in Tuckerman yesterday are partially or completely buried now. Winds persistently transported snow into Tuckerman through the day yesterday and they are still managing to move some snow in this morning. Expect to find areas posted at Moderate to be on the upper end of that rating today, particularly in Right Gully and the Bowl. These areas have just come down from Considerable and we have concerns about the possibility for human triggered avalanches in these locations. Your best bet for triggering an avalanche today is the Lip. This area picked up a lot of new snow since it avalanched and it looks ready to go again given the right load to tip the balance of stress and strength. Temperatures are forecasted to be quite warm today, with summit temperatures in the mid 20s to lower 30's F (about -4 to -1 C). Summit winds are forecasted to be W and NW 70 to 90 mph (112 to 145 kph) with higher gusts. These temperatures will help the new slabs settle down, particularly on shelterd southern aspects. However, the high winds could keep solar gain at bay and allow the snap to stay in the slabs. With these factors in mind, you can expect the snow to be less stable this morning. While folks heading into Tuckerman will need to contend with snow as a primary hazard, climbers in Huntington will be dealing with the very hard old surface. While some pockets in strong lee areas in Huntington still need to be treated with respect, the hard surface should be in the front of your mind at all times. The reason for this is because self-arrest on this surface is VERY difficult. It makes for good climbing conditions but awful stopping conditions. This surface can be found in other locations outside of Huntington as well so be ready with crampons, an ice axe and solid technique if you plan on traveling on the upper parts of the mountain today.
Yesterday we got out to look at some of the results from the recent avalanche activity. We concluded we had activity in Yale, Damnation, the Sluice, Lip, Bowl, Left Gully and Hillman's Highway. The most impressive of all of these was the Bowl and Lip avalanche that filled in the floor of the Ravine surprisingly well. This avalanche, and possibly the Sluice avalanche, stepped down into older slabs sending a tremendous amount of snow down into the floor of the Ravine. It's about time!
The Lion Head Winter Route is open. Mountaineering skills and equipment are required for safe travel on this route.
The Sherburne Ski Trail is open with varying conditions. In some places new snow is covering long sections of water ice, deep waterbars and water channels that can grab a ski tip very quickly. Increasing winds will likely scour a number of sections exposed to winds.
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Avalanche Advisory Archives.
United States Avalanche Danger Descriptions.
Échelle Canadienne de risque d’avalanche.
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