Posted on: 2020-01-31 09:51:53 by davidof

Stability Games

Stability tests on the 29th at the  Tête du Torraz in the Aravis at 1810 meters altitude. The slab was due to drifting and was resting on a weak layer of angular grains. The pisteurs remotely triggered another avalanche from the ridge. The departure zone is not too steep in the summer but was inclined at 35° due to the accumulation of snow due to the wind - a warning that relief maps are not a 100% guarantee that a slope is safe to ski. The avalanche risk was 4/5 in the sector with fragile slabs due to a difficult to detect buried weak layer, even a long way from cols and ridges.

A snowboarder falls and remotely triggers a large slide in the Orelle sector of Val Thorens near the Grand Fond funitel. You can see the gazex at the top of the slope and the slope was controlled that morning.