Seoul Metropolitan Area's 'Autumn Rainy Season' Subsides... Thunderstorms and Heavy Rainfall Pour in Southern Regions

On the 30th, scattered rain fell nationwide, with the Korea Meteorological Administration forecasting that the 'autumn monsoon' will subside in the Seoul metropolitan area and central regions. On the other hand, heavy rain exceeding 200mm is expected in some parts of the southern regions.

According to the Korea Meteorological Administration on the 30th, the expected cumulative rainfall until the 31st is 80-150mm in Busan, Ulsan, and Gyeongnam; 50-120mm in Daegu, Gyeongbuk, Gwangju, and Jeonnam; 30-100mm in Jeonbuk, Chungbuk, and Jeju; 30-80mm in Daejeon, Sejong, Chungnam, Gangwon Yeongseo, and eastern Gyeonggi; and 20-60mm in Seoul, Incheon, and western Gyeonggi. In the southern regions, some areas may experience strong and heavy rain accompanied by gusts of 30-60mm per hour, thunder, and lightning. As of 9 a.m. that day, heavy rain warnings were issued for Gwangyang in Jeonnam, Andong in Gyeongbuk, Hadong and Sancheong in Gyeongnam, and some parts of Jeju Island, while most other southern areas were under heavy rain advisories.

This rain originated from a narrow boundary zone formed by cold and dry air flowing southward from the west and the westward expansion of the North Pacific High. The central regions, including Seoul, Incheon, northern Gyeonggi, central Gangwon, and northern Gangwon, are expected to experience scattered rain until night, while southern Gyeonggi, southern Gangwon, Chungcheong, and Jeonbuk will see sporadic rain until early morning on the 31st before it stops.

Due to the influence of Typhoon Haikui (No. 11), which is moving northward, there is a possibility of rain nationwide again from the latter half of this week. As a large amount of hot water vapor flows in from the south where Haikui is located and meets the North Pacific High, rain is expected to start in the southern regions on the 1st of next month and spread nationwide by the 3rd. Regarding Haikui's path, the Korea Integrated Model (KIM) and the European Centre for Medium-Range Weather Forecasts (ECMWF) predict it will head toward Shanghai, China, while the UK Met Office Unified Model (UM) forecasts it will move toward the Korea Strait.

Although frequent rain continuing until the end of this month is commonly called the 'autumn monsoon,' the Korea Meteorological Administration does not officially use this term. A KMA official explained, "The term monsoon is used only for rain occurring from late June to late July." However, it is acceptable to say 'autumn monsoon' in everyday conversation.

This content was produced with the assistance of AI translation services.