The Rain Has Eased for Now, When Will the Jangma End?... Korea Meteorological Administration Says "Still Undecided"

Since last weekend, nearly 400mm of monsoon rain has poured nationwide, and although there is a temporary lull, the rain is expected to continue until the 26th. In particular, a 'water bomb' of up to 120mm is forecast to fall again, mainly in the Jeolla region and the western part of Gyeongnam. The atmospheric conditions around Korea have become unstable, making the end of the monsoon season uncertain.

As the monsoon front moves northward from the weekend, heavy monsoon rains are forecasted nationwide again. On the 21st, ships are securely tied to ropes at the Marina Bay dock in Yeouido, Seoul. Photo by Hyunmin Kim kimhyun81@

According to the Korea Meteorological Administration, rain is expected to fall in the central regions, including Seoul, Incheon, and Gyeonggi, from dawn to morning on the 26th. Expected precipitation until the morning of the 26th is 10-60mm in the central regions such as Seoul, Incheon, and Gyeonggi (with more than 80mm in southern Gyeonggi), 10-60mm in the inland and mountainous areas of Gangwon (with more than 80mm in the southern inland and mountainous areas of Gangwon), and around 5mm on the east coast of Gangwon. In the Chungcheong region, rain of 10-60mm (with more than 80mm in southern Chungcheong) is expected in Daejeon, Sejong, and Chungcheong.

In the southern regions, 30-80mm of rain is forecast in Gwangju and the Jeolla region (with more than 120mm in Gwangju and Jeonnam, and more than 100mm in Jeonbuk), 30-80mm in Busan and the southern coast of Gyeongnam (with more than 100mm in the western southern coast of Gyeongnam and near Jirisan), 10-60mm in Daegu, the inland and mountainous areas of Gyeongbuk, and inland Gyeongnam (with more than 80mm in some areas), and 5-40mm in Ulsan, the eastern coast of Gyeongsang, and Ulleungdo and Dokdo.

Even after the rain stops, there is a high possibility of showers ranging from 5 to 60mm nationwide. The Korea Meteorological Administration explained that due to overlapping atmospheric instability and topographical effects, heavy rain can fall all at once anywhere in the country. Furthermore, the position of the stationary front remains highly variable. This is because the variability of the edge of the North Pacific High, which greatly influences the stationary front, is as large as the distance between the northern and southern parts of the Korean Peninsula.

Moreover, depending on the development of Typhoon Doksuri (No. 5) and the tropical depression, the monsoon rain may continue. Although the typhoon is currently far from Korea, it is expected to pass west of Taiwan around Thursday and make landfall in southern inland China in the latter half of the week. Even if the typhoon does not directly affect Korea, it can influence the stationary front, causing significant variability.

The Korea Meteorological Administration predicted a 40% chance of precipitation from the 27th to the 1st of next month but stated that it is too early to conclude the end of the monsoon season. A KMA official said, “The position of the stationary front will be highly variable after the 27th,” adding, “There is a possibility of cloudy weather with rain mainly in the central regions until the 1st of next month.”

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