Overview

• The Japan Meteorological Agency warned that line-shaped heavy rain bands could form from the pre-dawn hours in Akita, Yamagata, Niigata, Toyama and Ishikawa, sharply raising flood and landslide hazards.
• JMA also cautioned that Tokyo and the surrounding prefectures of Saitama, Chiba, Ibaraki, Tochigi and Gunma face a risk of similar bands from evening into night on September 3.
• As of the morning of September 3, the tropical low south of Japan was moving north-northwest at about 25 km/h with central pressure near 1006 hPa and is forecast to reach typhoon strength by night.
• Forecast 24-hour rainfall totals peak at roughly 100–200 millimeters in parts of Kanto-Koshin, Tokai, Kinki, Shikoku and Kyushu through September 5, with thunderstorms likely in a very unstable air mass.
• Akita Prefecture reported Level 5 emergency safety orders in parts of Akita City, Gojome and Semboku, house inundations in multiple towns and a roughly five-hour suspension of the Akita–Morioka Shinkansen.