The rainfall pattern and circulation features associated with the Meiyu flooding of the Huaihe River valley, China in June are investigated by data analyses. The Meiyu flooding of the Huaihe River valley in June is associated with the second joint Singular Value Decomposition (SVD) mode of the Asia-Pacific circulation and rainfall. It is characterized as a ‘Meiyu dipole mode’ in eastern China with more rainfall to the north of the Yangtze River and less to the south. An anomaly anticyclonic circulation lies to the north of Taiwan and an anomaly cyclonic circulation lies to the south over the western Pacific in the lower troposphere. Moreover, an anticyclone is located over the Arabian Sea and the westerly winds and rainfall are strengthened over India. The above anomalies represent the lead variation in the seasonal evolution over the eastern Asia-Pacific area, and are related to the triple pattern in the oceanic heat content in the Pacific Ocean in spring. The ‘triple pattern’ heat anomaly stimulates the anomalies of the sea surface sensible heating and the associated subtropical anticyclone in the western Pacific. As a result, the ‘Meiyu dipole mode’ is induced. A heat content index can be defined and can be considered as one prediction index for Meiyu flooding events of the Huaihe River valley.