Overview
- Officials flag lightning, tornado or other violent gusts, hail, and sudden heavy downpours from Hokkaido through western Japan as unstable conditions persist.
- Forecast totals reach up to 60 mm in parts of Tohoku and Hokuriku by the morning of Nov. 3, followed by up to 50 mm in Tohoku and 100 mm in Hokuriku in the next 24 hours.
- A low near Hokkaido is tracking toward the Kuril Islands while another over the Sea of Japan is moving into Tohoku, sustaining the instability.
- The JMA urges caution for landslides, flooding in low-lying areas, and river rises, advising residents to monitor alerts, check radar, and prepare to evacuate if directed.
- Regional guidance in Hokkaido highlights heightened risk from the night of Nov. 2 into early Nov. 3 on the Sea of Japan side south and the Pacific side west for violent gusts, lightning, hail, and abrupt heavy rain.