“…P RECIPTATION nowcasting has long been an important problem in the field of weather, which supplies very short range forecast of rainfall intensity in a local region based on radar echo maps, observation data as well as the numerical weather prediction (NWP) models [1], [2]. Such predictions facilitate effective planning, crisis management, and the reduction of losses to life and property [3]- [5]. Due to relevant dynamical processes and the inherent atmosphere complexities, precipitation nowcasting is quite challenging and has emerged as a hot research topic [6]- [9].…”