Key Facts
• A low-pressure system on the autumn rain front will pass through Hokkaido on September 14.
• Linear rainbands may form in Hokkaido (Oshima, Hiyama, Ishikari, Sorachi, Shiribeshi, Iburi, Hidaka) from late September 13 to early September 14.
• Yamaguchi, Fukuoka, and Nagasaki may also experience linear rainbands early on September 14.
• Predicted rainfall: up to 180 mm in Hokkaido and northern Kyushu by evening.
• Eastern Japan and western Japan will see minimum temperatures of 25–27°C, with tropical nights expected.
• Maximum temperatures will rise, with highs of 36°C in Shizuoka and Takamatsu, and 35°C in Kumagaya and Miyazaki.
• Strong winds and potential storms are expected in Hokkaido through the morning of September 14.
• Rainfall predictions: 150 mm in Tohoku, 120 mm in Hokuriku and Tokai by evening.
• Residents in affected areas are advised to stay in safe locations, such as upper floors, during dark hours.
• Weather in Hokkaido and Tohoku is expected to improve by the afternoon of September 14.
Summary
A low-pressure system on the autumn rain front is expected to pass through Hokkaido on September 14, bringing the risk of linear rainbands in Hokkaido, Yamaguchi, Fukuoka, and Nagasaki. Rainfall could reach up to 180 mm in Hokkaido and northern Kyushu, with strong winds and potential storms in Hokkaido through the morning. Residents in affected areas are urged to take precautions, such as staying in upper-floor rooms away from rivers and cliffs. Temperatures will remain high, with tropical nights and maximum temperatures reaching 36°C in some areas. Rainfall in Tohoku, Hokuriku, and Tokai is also expected, with up to 150 mm in Tohoku by evening. Weather conditions in Hokkaido and Tohoku are anticipated to improve by the afternoon.
