Typhoon 7 is moving east and is expected to transition into an extratropical cyclone tonight [1].
The storm's trajectory places significant risk on the Kanto and Tokai coastal regions, where concentrated heavy rainfall may lead to localized flooding and infrastructure disruptions.
Forecast meteorologist Miki Kunimoto said the storm's rain clouds are skewed to the east of the center, which is driving the intense precipitation in coastal areas [1]. In Choshi, Chiba prefecture, rainfall has already exceeded 200 mm [1].
"Chiba prefecture, in Choshi, is in a situation where it exceeds 200 millimeters," Kunimoto said [1].
Other regions are also facing severe weather. The Boso and Miura peninsulas are expected to experience several hours of very heavy rain, with predicted maximums reaching 100 mm [1]. In Yamanashi prefecture, an area that previously experienced a major earthquake, rainfall has reached approximately 100 mm [1].
"Yamanashi prefecture, a region where there was a large earthquake, is in a situation where rainfall is approaching 100 millimeters," Kunimoto said [1].
While coastal areas face extreme conditions, reports from other parts of the region show varying intensity. A local reporter said that in the Kanda River area of Tokyo, the rain was light and wind was nearly nonexistent [2].
The transition to an extratropical cyclone tonight will signal a change in the storm's structure, though the risk of heavy rain remains until the system clears the region [1].
“Chiba prefecture, in Choshi, is in a situation where it exceeds 200 millimeters”
The concentration of rainfall to the east of Typhoon 7's center creates a high-risk scenario for the Chiba and Kanagawa coastlines even as the storm loses its tropical characteristics. The specific mention of Yamanashi's rainfall is critical because saturated soil in previously earthquake-damaged areas significantly increases the likelihood of landslides.
