Heavy monsoon rains hit Seoul and central South Korea on Thursday, prompting the season's first heavy-rain warning for the capital city.
The sudden onset of intense precipitation threatens urban infrastructure and rural agriculture, as the region faces significant accumulation in a short window.
Rain clouds swept into the Seoul metropolitan area on Thursday, prompting the season's first heavy rain warning for the capital, Cho Young-eun of Arirang News said.
Weather data indicates that accumulated rainfall exceeded 200 mm in parts of Chungcheong-do [1]. Southern Gyeonggi-do recorded nearly 200 mm of rain [1]. Meanwhile, forecasts for Seoul indicated up to 100 mm of rain [2].
MSN Weather said heavy monsoon rains are expected across the country until May 9, 2026, due to the influence of a stationary monsoon front [2]. This weather pattern is linked to the North Pacific high-pressure system, which brings the rainy season to East Asia.
According to MSN Weather, the North Pacific high-pressure system expanded unusually rapidly this spring, leading to an early rainy season in Japan [2]. This atmospheric shift contributed to the early onset of the rainy season in South Korea.
Despite the heavy downpours in the central region, reports on the broader rainy season remain mixed. Some data suggest the monsoon start is delayed in Jeju and the south, while other reports indicate the rainy season has officially begun for the country.
“Rain clouds swept into the Seoul metropolitan area on Thursday, prompting the season's first heavy rain warning for the capital.”
The early and intense arrival of the monsoon front, driven by the rapid expansion of the North Pacific high-pressure system, suggests a volatile start to the 2026 rainy season. The disparity in rainfall between the central regions and the south indicates a fragmented weather pattern that may complicate national disaster preparedness and agricultural planning.
