Edited sentence: These program "interruptions" may last from 5 minutes to over an hour.These program pre-empts normally occur between 4-5:00pm and at 7:00pm when they do not have a scheduled newscast....but other local television channels do.They present radar images and provide the lightning strikes in the tri-state area....over and over and over.WPXI often pre-empts programming to report common weather events (both rain and snow) as if these are "end of time" events