ased on MICAPS,a method of prospecting and nowcasting for severe convective weather in afternoon during midsummer is proposed by comprehensively weather maps,physical data fields,radar echoes and satellite cloud pictures. The early warning nowcasting products for different periods are disseminated by urban warning network,radio calling system and 168 information service (or 121 information service),thus,the workflow,designed for severe convective weather forecasting and forecasting products,and dissemination have been effectively improved from July to August in 1996. An early warning service experiment is carried out with good social and economy benefit.