MLS, CU of cine camera with special attachments aimed at clouds, technician moving into frame, peering into view finder. Two profile CUs of man looking into finder. HACUs of man looking into view finder, of camera as man takes a reading. LS of atmospheric research station, various testing equipment, lowering clouds over horizon. Three shots of radar scanners in motion. HAS of pair of all-sky cameras, dark range of hills in background, storm clouds. CU of mirror of all-sky camera. Shots of man winding cameras. LAMCS of oscilloscope, blips. Profile MCSs of technician at work. MSs of atmospheric research station, man in glass top trailer. Shots of three men near trailer, TILT UP to towering thundercloud. Two-shot of men discussing data. CU of paper in hands. CU of director of project. Shot of thunderclouds, PAN to station. Shots of station, cloud banks in background. Two CUs of helmetted workers looking up. Two shots of two technicians at work inside trailer, pulleys of tape recorder in background.