Gaz-ex mission relieved new snow loose avalanche along upper ridgeline. Snow cascading over the cliffs added enough additional load to release hard slab on apron below. Crown 2-5 ft, ave3.5 weak layer identified as faceted snow between two crusts. shallower snow pack in this area than slide on Fri gouging to the rocks in many places. Control results elsewhere was a mixed bag of storm snow slide varying 12"-25". No good photos due to bad visibility.