Weather Modification: Annual Report

agency aircraft American Meteorological Society analysis atmos Atmospheric Research atmospheric sciences basic biological Bureau changes climate modification cloud physics cloud seeding Colorado Colorado State University Commission condensation nuclei conducted continued convective cumulus clouds Dakota Department droplets dry ice dynamics effects effort electric fields engineering environment evaluation experimental Federal fication field experiments fiscal year 1966 formation hail suppression hailstorms hurricane ice crystals increase investigations laboratory lightning discharges measurements mechanism ments meteorological modi mountain national program National Science Foundation natural nucleation observed operational particles planning plume possible precipitation problems Project Hailswath Project Stormfury radar rain rainfall research and development scientific silver iodide simulation Skyfire social statistical storm studies supercooled surface techniques temperature thunderstorm tion tropical University W. H. Evans warm fog weather and climate weather modification weather modification activities weather modification program