
AI-generated summary
Typhoon No. 25 moved westward over the western coast of the Ogasawara Islands on the morning of the 19th, with a central pressure of 975 hectopascals and a maximum wind speed of 30 meters.
On the morning of the 19th, large-scale typhoon No. 25 moved westward over the sea west of the Ogasawara Islands. It is expected to become a stronger force as it moves northward, and is expected to move northeast around the Izu Islands and off the Kanto coast on the 21st. The Japan Meteorological Agency has warned people to be wary of strong winds, high waves, and heavy rain in the Kanto, Tokai, Izu Islands, and Tohoku Pacific coasts.
[Jiji.com Weather Forecast]
At 9 a.m. on the 19th, No. 25 headed west at a speed of 15 kilometers per hour on the sea about 250 kilometers west-southwest of Chichijima in the Ogasawara Islands. The central pressure was 975 hectopascals, the maximum wind speed was 30 m/s, and the maximum instantaneous wind speed was 45 m/s. An area with strong winds of 25 m/s or more is within a radius of 110 km, and an area of strong winds with winds of 15 m/s or more is within 750 km to the northeast and 390 km to the southwest.
A maximum instantaneous wind speed of 30.4 meters was observed on Chichijima just after 1:55 a.m. 25 is expected to pass off the coast of Sanriku on the morning of the 22nd and turn into an extratropical cyclone as it moves away to the east.
The predicted rainfall for the 24 hours up to 6 a.m. on the 20th is 120 mm in the Izu Islands and 80 mm in the Kanto region. After that, up to 6 a.m. on the 21st, the rainfall amount was 200 mm in the Kanto and Tokai regions, the Izu Islands, and 100 mm in the Tohoku region. As of 6 a.m. on the 22nd, the rainfall amount was 300 mm in the Kanto and Izu Islands, 200 mm in the Tokai region, and 150 mm in the Tohoku region.
AI outlook — possibilities, not facts
Typhoon No. 25 is expected to move northeast near the Izu Islands and off the Kanto coast on the 21st.
Likely · Within days
Typhoon No. 25 is expected to turn into an extratropical cyclone by the morning of the 22nd, passing off the coast of Sanriku and moving eastward.
Likely · Within days

On the 21st, when Typhoon No. 25 passed off the coast of the Boso Peninsula, there was record heavy rain of 278.0 mm in Sakura City, Chiba Prefecture, and 291.0 mm in Kisarazu City, making Sakura City and Kisarazu City record the heaviest rainfall in a single day in statistical history. As a result, landslides have occurred in both prefectures, with reports of flooding around stations, stranded cars, and trapped residents.

On the afternoon of the 21st, Typhoon No. 25 moved northeast over the sea north of Hachijo Island in the Izu Islands and approached the Kanto region. A special landslide warning (alert level 5) has been announced for Oshima-cho, Tokyo, and there is also forecast information for a linear rain belt in the Kanto region. Flights were canceled at Haneda and Narita airports, and there were suspensions and road closures at JR and expressways. It is a strong typhoon with a central pressure of 960 hPa and a maximum wind speed of 40 m/s.

On the morning of the 21st, Typhoon No. 25 moved north over the sea west of Hachijo Island in the Izu Islands, and connected with the Kanto region late at night. The Japan Meteorological Agency has called for strict vigilance for landslides, flooding, and river flooding due to heavy rain in the Kanto-Koshin, Tokai, and Tohoku Pacific sides, and has issued a special landslide warning (level 5) for Izu Oshima. In Funabashi City, Chiba Prefecture, the 12-hour rainfall was 172.0 mm, the highest in September's statistical history. A maximum instantaneous wind speed of 37.0 meters was observed at Hachijojima Airport. The forecast rainfall for the 24 hours until noon on the 22nd is 250 mm in the Kanto, Tokai, and Izu Islands, and 150 mm in the Tohoku region.

Large and strong Typhoon No. 25 is expected to move north over the sea to the west of Hachijo Island in the Izu Islands on the morning of the 21st, and after making a substantial connection to the Kanto region late on the same day, it is expected to move away toward the eastern Tohoku region. The Japan Meteorological Agency has called for strict vigilance in the Tohoku-Pacific region, Kanto-Koshin, and Tokai regions against landslides, flooding of low-lying areas, and rising river waters due to heavy rain, as well as warning against strong winds and high waves. A linear precipitation zone has been predicted for the Kanto-Koshin and Tokai regions, with the possibility of occurrence in Shizuoka Prefecture until the evening of the 21st, in the Izu Islands, Kanagawa and Yamanashi prefectures until the evening, and in Ibaraki, Saitama, Chiba and Tokyo until late at night. At Hachijojima Airport, a maximum instantaneous wind speed of 37.0 meters was observed just after 7:35 a.m., and in Funabashi City, Chiba Prefecture, rainfall in the 12 hours up to 8:20 a.m. was 172.0 mm, breaking the all-time record for September at that location. As of 10 a.m., Typhoon No. 25 was traveling approximately 110 kilometers west-southwest of Hachijo Island toward the northeast at 20 kilometers per hour, with a central pressure of 960 hectopascals, maximum wind speed of 40 meters, and maximum instantaneous wind speed of 55 meters. A storm area with wind speeds of 25 meters or more is within a radius of 185 km, and a strong wind area with wind speeds of 15 meters or more is within a radius of 650 km to the east and 440 km to the west. The predicted rainfall for the 24 hours until noon on the 22nd is expected to be 250 mm in the Kanto, Tokai and Izu Islands, and 150 mm in Tohoku.

On the morning of the 9th, rain became heavier from Tohoku to Chugoku and Shikoku due to a front and a tropical cyclone near Shikoku. The Japan Meteorological Agency has called for caution against landslides, flooding, and river flooding, and has suggested that a linear precipitation band may occur in the Tokai, Kinki, and Shikoku regions. Although the special flood warning for the Shonai River has been lifted, Aoi Ward in Shizuoka City and Chikusa Ward in Nagoya City recorded 262.5 mm and 219.5 mm of rainfall over a 24-hour period, respectively. The predicted rainfall until the 10th was announced to be 200mm in the Tokai and Kinki regions and 150mm in Shikoku.

At 4:15 a.m. on the 7th, the Japan Meteorological Agency announced a Level 5 landslide special warning for the northern part of the Izu Islands. The target area is Niijima Village, Tokyo. Due to the effects of Typhoon No. 24 and the front, heavy rain of 250 mm is expected in the Kanto-Koshin region and 300 mm in the Tokai region, and JR East has announced suspension of service on various lines in the Tokyo metropolitan area.