THUNERSEE, STURM, UNWETTER, REGENWOLKE, STURMFRONT, WOLKE, WOLKEN, DUNKEL, DUNKELHEIT,THUNERSEE, STURM, UNWETTER, REGENWOLKE, STURMFRONT, WOLKE, WOLKEN, DUNKEL, DUNKELHEIT,Regenwolken tuermen sich ueber dem Thunersee, am Mittwoch 30. Maerz 2011 in Daerligen. (KEYSTONE/Peter Schneider)....Rain clouds tower over the Lake Thun near Daerligen, Central Switzerland, Wednesday, March 30, 2011. (KEYSTONE/Peter Schneider)