Sweeper Storm
this artificial storm was generated by the authorities on the planet Bonadan. Sweeper storms were generates on the outskirts of manufacturing centers when the air became too caustic for the local inhabitants. The rain and lightning which were produced served to precipitate out some portion of the pollution which was spewed into the atmosphere every day. Each sweeper storm was more concentrated and violent than any normal storm, with the funnel around the eye being designed to create maximum ionization of the atmosphere.