Typhoon No. 30 becomes extratropical, with heavy rain still forecast across Japan

Typhoon No. 30 became an extratropical low in the East China Sea at 9 p.m. on October 25, TBS reported, citing the Japan Meteorological Agency. The system was moving northeast over waters west of Kyushu and was forecast to pass through Kyushu and reach waters south of Shikoku by the night of October 26. NHK also reported that the typhoon had changed into an extratropical low on October 25 night. [ 52 , 55 , 56 ]

Despite that transition, NHK said atmospheric conditions in western and eastern Japan would remain very unstable on October 26, with a risk of locally very heavy rain. The broadcaster reported that the weather agency was warning of landslides. TBS said warm, moist air flowing toward a front was intensifying its activity, sustaining the heavy-rain threat after the typhoon weakened. [ 47 , 55 , 56 ]

Earlier reports had forecast a close approach to Kyushu and a possible landfall while the system was still a typhoon. By the evening of October 25, TBS expected it to become extratropical before crossing Kyushu. Its Nagasaki coverage warned of landslides from heavy rain through October 26 and storm-force winds at sea. Nippon TV also reported heavy-rain risks in Fukuoka and Saga and urged vigilance against landslides. [ 11 , 35 , 42 , 45 ]

Rain had already affected parts of the region before the system's approach. TBS reported warning-level heavy rain in Tsushima, Nagasaki Prefecture, on October 24, with the local meteorological office urging close attention to landslide risks. Earlier coverage carried warnings about flooding in low-lying areas and rising or overflowing rivers as moist air around the typhoon fed the autumn rain front. [ 6 , 7 , 12 ]