It may be an even 400 Warren County High School graduates who walk the stage this Friday night to receive their high school diplomas.Lineup begins at 6 p.m. with the ceremony scheduled to start at 7 p.m. at Nunley Stadium.Final exam grades and course credits are still being compiled for some students, with senior guidance counselor Dr. Keri McGiboney saying she expects the final number for the graduation ceremony to be right at 400.As is always the case with the outdoor event, all eyes will be on the weather. The extended forecast from the National Weather Service calls for a slight chance of thunderstorms, about 20 percent, Friday night.Eight co-valedictorians are scheduled to share a keynote address entitled “We Are On Our Way.” Mary Richardson is scheduled to sing the national anthem and Andrea Hobbs is set to sing “I Don’t Want to Miss A Thing.”Seniors are required to attend graduation rehearsal at 9:30 a.m. Friday morning at Nunley Stadium if they want to walk that night.