Wednesday 23 December 2009

Lake District Avalanches

There's a fair bit of avalanche risk around the Lakes at the moment. The east face of Helvellyn has some huge cornices and a number of crown walls where avalanches have released. I did hear of one party who made an attempt on the bowl but they sensibly beat a hasty retreat!


Over on Brown Cove Crags things were slightly more stable. I dug a pit in one of the gully's and the snow pack was nearly two meters thick. Although the snow was fairly uniform there were some distinct layers that slid very easily. The surface layer was approximately 2" of soft wind slab. Below this there were a number of layers of loosely bonded snow between 2" - 6" thick. Separating these were a number of layers of graupel which act like ball bearings. There is a definite possibility that things could slide with very little additional loading. What we need now are a couple of cycles of freeze thaw to consolidate the snow pack and then conditions should be pretty special.