Graphical Abstract

Awazu, T., S. Otsuka, and T. Miyoshi, 2019: Verification of precipitation forecast by pattern recognition. J. Meteor. Soc. Japan, 97, 1173-1189. Abstract with highlights

Plain Language Summary: This paper proposes a new verification metric, the Pattern Similarity Index (PSI), which evaluates location errors and shapes of rainfall areas simultaneously. Pixel- by-pixel verification methods are widely used, such as the threat score and root mean squared error, but they have difficulties in evaluating location errors and shapes of rainfall areas. PSI adopts a simpler, computationally more efficient algorithm than the previous studies.