 While at peak intensity, Rammasun turned northward, steered around the subtropical ridge to its east, and early on July 3 it struck the Japanese island of Miyako-jima. A stationary trough over China weakened the convection on the western periphery of the typhoon, and the eye gradually became less organized. On July 4, Rammasun began weakening, and by 0000 UTC on July 5 it was located about 280 km (175 mi) east-northeast of Shanghai as a minimal typhoon. Shortly thereafter, Rammasun weakened to tropical stom status. An approaching trough caused the storm to accelerate to the northeast, which weakened the convection and left the circulation exposed. Around 2200 UTC on July 5, Rammasun made landfall in South Korea, near Seosan or about 70 km (45 mi) northwest of the country ’ s capital of Seoul. The JTWC estimated that the landfall intensity was around 65 km / h (40 mph). The storm quickly crossed the country, and although the JTWC considered Rammasun dissipated early on July 6 over the country, the JMA continued tracking the storm toward the northeast, declaring the storm extratropical at 1200 UTC that day. Early on July 8, the JMA reported that the remnants of Rammasun dissipated to the south of Vladivostok.
