Up to 200mm More Rain Expected: Heavy Downpours Focused on Chungcheong and Honam Regions

Heavy and intense rain is expected to continue today, July 9.

A stationary front, formed by the collision of hot and humid air blowing along the edge of the North Pacific High to the south and dry air descending behind a pressure trough to the north, is currently positioned over the Chungcheong and Honam regions. This has caused, and continues to cause, very heavy rainfall, particularly in the central regions, Honam, and the central and northern parts of Gyeongbuk.

Overnight, a large amount of water vapor was funneled in by strong winds in the lower atmosphere, further increasing precipitation levels.

In Goun-dong, Sejong, 81.5mm of rain fell in just one hour between 6:00 a.m. and 7:00 a.m. today.

During a similar timeframe, "extreme heavy rain" was recorded in Yeonseo-myeon, Sejong, with 79.0mm, and in Boeun-gun, Chungbuk, and Cheongyang-gun (Jeongsan-myeon), Chungnam, with 77.9mm and 76.0mm, respectively.

The total rainfall from yesterday until 8:00 a.m. today reached over 200mm in parts of the Chungcheong region, including 233.5mm in Gyeryong, Chungnam; 224.0mm in Goun-dong, Sejong; 222.5mm in Daedeok-gu (Jang-dong), Daejeon; 222.0mm in Cheongju (Cheongnamdae), Chungbuk; and 207.3mm in Daejeon.

During the same period, 93.1mm of rain was recorded in Gwangju, 27.2mm in Seoul, and 25.5mm in Incheon.

In the Yeongnam region, excluding the central and northern parts of Gyeongbuk, there has been almost no rain. Cumulative precipitation from yesterday until 8:00 a.m. today shows 0mm in Busan and Ulsan, and only 1.1mm in Daegu.

The rain is expected to cease as the North Pacific High gradually expands and pushes the stationary front northward.

Considering the expansion of the North Pacific High, the rain is expected to mostly stop in the Chungcheong and southern regions by tonight, while it will continue in the Seoul metropolitan area and Gangwon province until the morning of July 10.

Additional rainfall is expected as follows: 80–150mm in Daejeon, Sejong, Chungnam (excluding the northwest), central and southern Chungbuk, Jeonbuk, Gwangju, and northwestern and central coastal Jeonnam (with over 200mm in some areas of Daejeon, Sejong, Chungnam, Jeonbuk, and northwestern Jeonnam); and 50–100mm in inland and mountainous Gangwon, northwestern Chungnam, and northern Chungbuk (with over 150mm in some inland Gangwon areas).

Furthermore, 30–80mm is expected in the Seoul metropolitan area, eastern and southwestern Jeonnam, and central, northern, and southwestern inland Gyeongbuk (with over 120mm in some parts of the Seoul metropolitan area and over 100mm in some parts of central, northern, and southwestern inland Gyeongbuk); 20–60mm in the five West Sea islands, Daegu, southeastern Gyeongbuk, and western inland Gyeongnam; 5–40mm in the eastern coastal Gangwon, Ulleungdo, and Dokdo; and 5–10mm in Jeju.

Heavy rain will continue to fall in various places, with concentrated downpours of 30–50mm per hour recurring throughout the morning in the Chungnam region, Jeonbuk, and northwestern Jeonnam.

As the ground is already saturated from previous heavy rainfall, thorough preparations are necessary to prevent further damage.

Hot weather will persist, centered on the southern regions.

Due to the hot and humid air flowing along the edge of the North Pacific High, daytime temperatures in the southern regions will rise above 30°C (86°F) today, with perceived temperatures reaching around 31°C (88°F).

In areas under heat wave advisories, such as southeastern Jeonnam, Yeongnam, and Jeju, the perceived temperature is expected to climb to 33°C (91°F) or higher.

As of 8:00 a.m., temperatures in major cities were 25°C (77°F) in Seoul, 25°C (77°F) in Incheon, 23.6°C (74°F) in Daejeon, 24.8°C (77°F) in Gwangju, 25.8°C (78°F) in Daegu, 27.6°C (82°F) in Ulsan, and 26.4°C (80°F) in Busan.

Today's daytime highs are expected to range from 25°C to 34°C (77°F to 93°F).

The heat is expected to intensify as the North Pacific High expands, pushing the stationary front northward and covering the Korean Peninsula.

(Photo: Yonhap News)
※ Please note: This article was translated by AI and may contain errors.