CHARLESTON, W.Va. — National Weather Service Meteorologist Tom Mazza worked the overnight shift at the Charleston Weather Bureau on the night of June 23,2016. He recalled rain in the forecast and some strong showers before he clocked out, but never expected to see what happened as the day moved along. “It was definitely an over-performer. It was a smaller scale event where everything just came together,” he said. When it all came together it was…