When George Kuchar passed away in 2011, the country lost one of its great experimental filmmakers. Trained as a commercial artist, Kuchar and his brother Mike were contemporaries of Stan Brakhage and Andy Warhol in the underground film scene in New York before George moved to San Francisco in the 1970s. His idiosyncratic melodramas and diaristic films, all shot loosely and with low production values, maintained the same lack of pretension from his teenage years to the end of his career, by which time he'd made literally hundreds of works. Duke presents two of his video Weather Diaries from the late 1980s, when Kuchar made annual pilgrimages to El Reno, Okla., staying in the YMCA there for weeks to try to observe tornadoes. Kuchar called these "journeys of jubilant junk food and delightful dread." The Screen Society offers a rare opportunity to see these seminal, essential works.