Overview

• The advisory flags a pre-dawn to morning window on Sept. 3 for potential band formation in Akita, Yamagata, Niigata, Toyama and Ishikawa.
• Authorities urge strict vigilance in Tohoku through late morning on Sept. 3 for landslides, inundation of low-lying areas, and river rises and flooding.
• Noshiro in Akita logged 172.5 mm in the 24 hours through 5:40 p.m. on Sept. 2, setting the site’s highest September total on record.
• Forecast totals through 6 p.m. on Sept. 3 reach up to 180 mm in Tohoku, 150 mm in Hokuriku, and 120 mm in Kanto-Koshin, with higher localized amounts possible if bands develop.
• The Japan Meteorological Agency cites a very unstable atmosphere tied to a low and frontal zone over the Sea of Japan as the driver of the heavy rain threat.