Typhoon No. 10 Hits Japanese Archipelago...High Possibility of Linear Rainfall Band in Kinki and Tokai Regions

Due to the impact of Typhoon No. 10 that landed on the Japanese archipelago, rain has been continuously falling for extended periods in areas including Kyushu and Shikoku, as well as the Kanto and Tokai regions, which are relatively far from the typhoon's path. Furthermore, rainfall has intensified in the Chugoku region, leading to a sustained high risk of disasters.

According to the Japan Meteorological Agency (JMA), as of 9:00 PM on August 30th, Typhoon No. 10 was located near Shikokuchuo City, Ehime Prefecture, moving eastward at a speed of approximately 20 km/h.

The central pressure of the typhoon is 996 hPa, with maximum wind speeds of 18 m/s and maximum instantaneous wind speeds of 25 m/s. Strong winds exceeding 15 m/s are blowing within a radius of 330 km from the typhoon's center.

The slow movement of the typhoon, coupled with the influence of warm, humid air flowing along its periphery and the edge of the Pacific high-pressure system, has resulted in prolonged rainfall across various regions of western and eastern Japan, leading to record-breaking torrential downpours.

In areas such as Tokai, Kanto, and Kyushu, rainfall exceeding 400 mm in 48 hours has been recorded, breaking past records in numerous locations.

Specifically, a rain gauge installed in Inancho, Wakayama Prefecture, recorded 41 mm of rainfall in a single hour up to 11:00 PM on August 30th. Additionally, a rain gauge installed by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) in Yasugi City, Shimane Prefecture, observed 37 mm of torrential rain.

As a result of these continuous heavy rains, areas such as Saitama Prefecture, Tokyo, Kanagawa Prefecture, Shizuoka Prefecture, Tokushima Prefecture, Ehime Prefecture, Shimane Prefecture, Okayama Prefecture, and Hiroshima Prefecture are facing an extremely high risk of debris flow disasters. Debris flow hazard warnings have been issued for some of these areas.

<h3>Possible Development of a Linear Rainband in the Kinki and Tokai Regions on the Morning of August 31st</h3>

Rainfall is expected to continue in western and eastern Japan until September 2nd, with a high probability of locally very heavy rain on August 31st. In particular, there is a high likelihood of a linear rainband developing across the Kinki and Tokai regions during the morning of August 31st, potentially leading to a rapid increase in the risk of disasters.

The anticipated rainfall for the 24-hour period ending late on August 31st is as follows:

* Tokai: Up to 400 mm * Kinki: Up to 300 mm * Kanto-Koshin, Shikoku: Up to 150 mm * Hokuriku, Chugoku regions: Up to 120 mm

Due to the slow movement of the typhoon, there is a high possibility that the amount of rainfall will further increase in the future.

The anticipated rainfall for the 24-hour period ending late on September 1st is as follows:

* Tokai: Up to 400 mm * Kinki: Up to 300 mm * Kanto-Koshin: Up to 200 mm * Hokuriku: Up to 120 mm * Shikoku: Up to 100 mm

The anticipated rainfall for the 24-hour period ending late on September 2nd is as follows:

* Tokai: Up to 200 mm * Kanto-Koshin: Up to 150 mm * Hokuriku: Up to 100 mm

Record-breaking torrential rainfall is expected in various regions.

The Japan Meteorological Agency (JMA) has urged people to exercise extreme caution against debris flow disasters, low-lying area inundation, and river flooding. They have also advised vigilance against strong gusts, including lightning and tornadoes.

Previous heavy rainfall has weakened the ground in wide areas, and river water levels are high. Therefore, even a small amount of additional rain could significantly increase the risk of disasters. Please ensure your safety by moving to a nearby sturdy building or a higher floor of a building.