A pontoon based evaporative system has a weather monitoring station and control algorithm to shut down or slow down the atomizing fans in certain wind conditions. The central control system can control droplet size by slowing the fans down. The watercraft is collapsible to provide a fourteen foot width while afloat to support a plurality of atomizing fans high in the air. For transport the watercraft folds down to a nine foot trailer width with the atomizing fans resting on the base. An alternate embodiment is a land based frame having the same atomizing fans and weather monitoring and control algorithm.