Following the targets defined by the program “China Heavy Rainfall Experiment and Study”,research is undertaken of a typically exceptional torrential rainfall event in July 1998, revealing the features, evolution and interrelation with meso-scale rainmass activity of recurring structures of surface flow patterns of two kinds in Hubei of central China, whereupon is established a physical representation of the interrelation of the surface flow patterns with meso rainmass activity during an intense Meiyu frontal rainstorm typical of its occurring region.