A flood advisory is in effect for Mason County. The National Weather Service in Grand Rapids has issued the flood advisory for the P.M. River near Scottville, until late Thursday night. Flood stage is 5.5 feet and as of 7am this morning, the stage was at 4 feet. The river is expected to rise to 4.6 feet by tomorrow evening. High water is likely to cover campground roads in Scottville Park.