The Kanto-Koshin region is forecast to see thunderstorms and heavy rain from late on the night of November 4 until shortly before noon on November 5, the Japan Meteorological Agency said. Parts of the Izu Islands could get very heavy rain of 50 millimeters an hour.
If developed rain clouds keep passing over the same areas, the rain could reach warning level, the agency said. It urged residents to watch for landslides, flooding in low-lying land and rising rivers from before dawn until evening on November 5.
Typhoon No. 31 moving north over the sea south of Japan
As of 9 a.m. on November 4, a strong Typhoon No. 31 was moving slowly north-northwest over the sea south of Japan, according to the typhoon bulletin the agency issued at 9:45 a.m. Winds of 25 meters per second or more covered an area within 130 kilometers east and 110 kilometers west of the center.
The typhoon is expected to pass west-northwest of Chichijima, about 280 kilometers away, on the morning of November 5, then speed up toward the northeast. It is forecast to become an extratropical cyclone east of the Kuril Islands on the morning of November 7.
The Ogasawara Islands are expected to see strong winds and swells reaching 5 meters. Forecasts show rain clouds developing from the northern Izu Islands to the Kanto coast on the morning of November 5.
- 9 a.m. November 4 (observed): strong typhoon over the sea south of Japan at 24.2 degrees north, 138.5 degrees east; moving slowly north-northwest; central pressure 970 hPa; maximum wind speed near the center 35 m/s; maximum gust 50 m/s
- 9 p.m. November 4 (forecast): strong typhoon over the sea south of Japan at 25.8 degrees north, 138.4 degrees east; moving north at 15 km/h; central pressure 970 hPa; maximum wind speed near the center 35 m/s; maximum gust 50 m/s
- 9 a.m. November 5 (forecast): typhoon about 280 kilometers west-northwest of Chichijima at 27.9 degrees north, 139.5 degrees east; moving north-northeast at 20 km/h; central pressure 975 hPa; maximum wind speed near the center 30 m/s; maximum gust 45 m/s