With the goal of predicting the future rainfall intensity in a local region over a relatively short
period time, precipitation nowcasting has been a long-time scientific challenge with great
social and economic impact. The radar echo extrapolation approaches for precipitation
nowcasting take radar echo images as input, aiming to generate future radar echo images
by learning from the historical images. To effectively handle complex and high non-
stationary evolution of radar echoes, we propose to decompose the movement into optical …