Saturday, January 22, 2011

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Updated: URGENT NOTICE FOR AVALANCHE NORTH FACE PLATE IN

Notice plate avalanche risk in northern slopes, following the winds of the last 24 h

Today Saturday a couple of climbers has triggered an avalanche of plaque on the north side of Sabocos, burying one of them. The team of 061 and Guardia Civil is currently in search of work mountaineer buried.
These two mountaineers (a Navarre and La Rioja) that, like other French group had gone into the corridor Sabocos Pico Panticosa Ice with winter mountaineering equipment for snow and ice.
Once atop this couple has begun the descent on foot with crampons, in the normal way of the north face, down the corridor to a plain NW then flows into a funnel just above the ski station Panticosa ski and mountain lakes of asses and Sabocos.
The landslide result was due before the funnel, drawing on both mountaineers. The avalanche has quickly become large, dragging large ice blocks. Comment that has come to measuring 100m wide and has advanced a distance of 700m. One of two climbers have managed to grab one of those big blocks of ice floating on the flood, as it clings to a raft in a river, which has saved him from being buried. The other partner has not had the same luck and keep buried. The area is displayed all the teams Greim, with snow dogs brought from Benasque helicopter. It's getting dark and the night is long wait, and the extremely low temperatures.
Just then travel by helicopter from Benasque to Panticosa to bring the dogs, the physician of 061 has been observed during the flight many huge plates in all the northern slopes of the Pyrenees, which seem haberese formed during the afternoon and last night with strong winds of the last hours. Just a Panticosa tracks skiing on Friday dropped for the same area Sabocos said yesterday there was none of these plates are seen today.
In fact, Góriz guards say that yesterday a group going to the Gap from Góriz endured strong winds coming from behind, ie from south! Which is hard to understand being the dominant wind pattern was Northeast yesterday. Perhaps this strong south entrance by orographic channeling of the air masses (like the water that is adapted to the ways of the river) formed all these plates in the northern slopes.

Apparently, the strong winds of the last 24 hours (which peaks have occurred in all directions) have formed new plates on north slopes at higher elevations , which are likely to break even with weak overload . As was the case of these two climbers, who descended on foot (not even skiing).
Although the winds were from north and northeast, the high speeds has to be channeled in many directions, forming plaques mainly in the north where the sun does not stabilize the snow.

The very low current temperatures remain too fragile these new plates without cohesion. So will on the northern slopes for several days, not seeing the northern slopes this January sun under the negative temperatures keep these coming days.
addition, the temperature gradient is very high now. Describes the difernecia between soil temperature (below 0 º C) and air, which these days is around -14 º C in shaded faces. This gradient so high makes the cohesion of the snow crystals and makes the process of plaque stabilization is extremely slow. So there will still be extremely careful in all faces north for many days.

slopes are advised to move south , Sunny, snow pellets whose contact with the sun, tend to rounding and greater cohesion.
Paradoxes of life. We said that this year had been sufficient light snow and chilly temperatures and strong gusts of wind to form a new plates as if by magic (without snow for more than a week). Combinations of low temperatures and strong winds are very dangerous.
Prudence and shelter. Jorge García-

Dihinx

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