 Before then, the Lehigh Valley was one of the few areas of Pennsylvania without a locally-based NPR station.WHYY-FM in Philadelphia, provides grade B coverage to most of the Lehigh Valley, while WVIA-FM in Scranton has long operated low-powered translators in parts of the region.Although WDIY's transmitter power was modest for a full NPR member, its antenna on top of South Mountain enabled the station to reach most of the immediate Lehigh Valley region.