Graphical Abstract

Hirockawa, Y., T. Kato, H. Tsuguti, and N. Seino, 2020: Identification and classification of heavy rainfall areas and their characteristic features in Japan. J. Meteor. Soc. Japan, 98, 835-857.
Special Edition on Extreme Rainfall Events in 2017 and 2018,
Graphical Abstract with highlights

Plain Language Summary: We propose a new procedure for the objective identification and classification of heavy rainfall areas (HRAs) to advance the understanding of mesoscale convective systems (MCSs) in Japan. The distributions of accumulated precipitation amounts are evaluated from the radar/raingauge-analyzed precipitation amounts and characteristic features of HRAs are examined. The HRAs extracted during the warm season (April–November) in 2009–2018 are classified into four types (e.g., linear-stationary, linear, stationary, and others) from their morphological features and temporal variations.