Typhoon Hinnamnor brought strong gusty winds and heavy rain to South Korea on Monday. At 5:00 p.m. EDT on Monday the center of Typhoon Hinnamnor was located at latitude 35.7°N and longitude 129.2°E which put it about 80 miles (130 km) southwest of Busan, South Korea. Hinnamnor was moving toward the north-northeast at 25 m.p.h. (40 km/h). The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h). The minimum surface pressure was 964 mb.

Typhoon Hinnamnor was a large, powerful typhoon when it began to affect South Korea. Winds to typhoon force extended out 45 miles (75 km) from the center of Hinnamnor. Winds to tropical storm force extended out 280 miles (455 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 17.8. The hurricane Size Index (HSI) was 22.8 and the Hurricane Wind Intensity Size Index (HWISI) was 40.6. Typhoon Hinnamnor was capable of causing widespread serious damage.

Typhoon Hinnamnor will move quickly toward the north-northeast across southeastern South Korea during the next few hours. The strongest winds will occur southeast of a line from Busan to Pohang. Hinnamnor will drop heavy rain over much of South Korea. Heavy rain could cause flash floods in some locations.

Typhoon Hinnamnor will move into an environment unfavorable for a tropical cyclone during the next 24 hours. Hinnamor will move over water where the Sea Surface Temperatures are near 24˚C. It will move under the eastern side of an upper level trough over China. The trough will produce strong southwesterly winds that will blow toward the top of Hinnamnor’s circulation. Typhoon Hinnamnor is likely to make a transition to an extratropical cyclone as it moves over the Sea of Japan during the next 24 hours.