Abstract
Numerical analysis and forecasting with fine mesh is compared with that with coarse mesh in the case of synoptic situations of severe rain. The models used for the comparison are 4-layer quasigeostrophic dry and wet models. In the numerical analysis and prediction with fine mesh of 150 km, a vertical velocity field of medium scale can be detected in regions corresponding to severe rainfall, except the rainfall area following large-scale motions. On the other hand, in the analysis and prediction with coarse mesh of 300 km, no vertical velocity field of medium scale is detected. And furthermore analysis is made of synoptic situations of such scale. Synoptic analysis is discussed in view of thermal fields, vertical stabilities, vertical motions and surface frontal activities with various vertical cross sections.
