Hydrometeorological disasters are one of the major natural disasters affecting China. Hydrometeorological grid data form a dynamic threedimensional flow field. The visualizing flow field is important to explore the inherent variation of hydrometeorological disasters. Considering the data characteristics of large amount, multidimensional, multiscale and dynamic changing, this paper presents a 3D dynamic visualization method for flow fields based on a virtual globe. It includes two data processing methods: flow field data organization and dynamic data interpolation. Meanwhile, three improved visualization techniques including particle tracking, 3D streamline and volume rendering are studied. Finally, the method is verified by two different cases: river flood and typhoon. The experiments show that the method can smoothly realize the detailed dynamic visualization of the threedimensional flow field, which is of great significance for emergency decisionmaking of hydrometeorological disasters.