There is a risk of heavy rain on the Pacific side of eastern Japan due to the front and Typhoon No. 24, and a linear precipitation band is also predicted.
Quick Look
- On the morning of the 6th, rain fell on the Pacific side of eastern Japan due to the front and Typhoon No.
- 24 near the main island of Okinawa.
- The front is expected to move north on the 7th, causing heavy rain mainly in the Kanto-Koshin and Tokai areas, as well as in the Pacific side of Tohoku and western Japan.
AI-generated summary
Why It Matters
Due to the influence of the front and Typhoon No. 24, rain is increasing mainly on the Pacific side of eastern Japan. In particular, heavy rain has been observed in a short period of time on Hachijo Island in the Izu Islands, and there are predictions that a linear rain belt will form.
Rain fell in some places on the Pacific side of eastern and western Japan on the morning of the 6th due to a front extending offshore and Typhoon No. 24 near the main island of Okinawa. The front is expected to move northward on the 7th, causing heavy rain in some places, mainly in the Kanto-Koshin and Tokai regions, as well as in Tohoku and the Pacific side of western Japan. The Japan Meteorological Agency warned people to be on guard against landslides, flooding in low-lying areas and rising river waters, and to be careful of lightning strikes and gusts of wind.
<Jiji.com Weather Forecast>
Forecast information for a linear precipitation belt was issued in the Kanto and Tokai regions. There is a possibility that the outbreak will occur in the Izu Islands until dawn on the 7th, in Aichi and Mie prefectures from the night of the 6th to the morning of the 7th, in Shizuoka Prefecture from the night of the 6th until noon on the 7th, and in Tokyo (excluding Izu and the Ogasawara Islands) and Saitama, Chiba, and Kanagawa prefectures from late on the night of the 6th to before noon on the 7th.
On Hachijo Island in the Izu Islands, 84.0 millimeters of heavy rain fell in the hour until just after 6:35 a.m. on the 6th, and 240.5 millimeters of rain fell in the six hours until 8:30 a.m. on the 6th.
24 is expected to turn into a tropical cyclone over the sea east of the Amami region on the 8th. At 9 a.m. on the 6th, the vessel was heading east-northeast at a speed of 15 kilometers per hour over the ocean about 190 kilometers east of Naha City. The central pressure was 992 hectopascals, the maximum wind speed was 18 m/s, and the maximum instantaneous wind speed was 25 m/s. Areas with strong winds of 15 meters per hour or more are within 650 km on the west side and 330 km on the east side.
The predicted rainfall for the 24 hours up to 6 a.m. on the 7th is expected to be 300 mm in the Tokai region, 250 mm in the Kanto-Koshin region, 200 mm in the Kinki region, and 150 mm in Shikoku and southern Kyushu.
After that, up to 6 a.m. on the 8th, the rainfall amount was 200 mm in Tohoku and Tokai, 150 mm in Kanto-Koshin, and 120 mm in Kinki. As of 6 a.m. on the 9th, the rainfall amount was 200 mm in the Tokai region, 150 mm in the Shikoku region, and 120 mm in the Kinki region.
What to Watch
AI outlook — possibilities, not facts
Heavy rain expected mainly in Kanto-Koshin and Tokai areas
Likely · Within days
Possibility of a linear rain belt occurring in the Izu Islands and Hachijo Island
Possible · Within days
Typhoon No. 24 turns into a tropical cyclone off the eastern seaboard of the Amami region on the 8th.
Very likely · Within days
Open Questions
- What is the actual extent of the damage?
- Have evacuation advisories and instructions been issued?
- What will be the impact on traffic?





