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Heavy Rain to Soak Country Through Monday, Exceeding 200mm in South Chungcheong

Jang Seon-i

Published : Aug 29, 2026 2:00 PM


▲ File image related to heavy rain

Strong rain is expected nationwide through Monday, August 31, as a stationary front forms over the Korean Peninsula.

In particular, torrential downpours exceeding 200 millimeters are forecasted for parts of South Chungcheong Province, and over 150 millimeters for North Chungcheong and North Jeolla provinces, calling for special caution regarding safety accidents.

According to the Korea Meteorological Administration, a stationary front has developed from the collision of hot, humid air from the south and cold, dry air from the north over the Korean Peninsula, bringing heavy rain nationwide through Monday.

The stationary front will intensify starting Sunday, August 30, forming linear precipitation bands with strong atmospheric instability.

As a result, very strong and heavy rain is projected to concentrate mainly in the Chungcheong and Jeolla regions.

Expected precipitation for tomorrow and the day after is 80 to 150 millimeters for Daejeon, Sejong, and South Chungcheong, with some areas receiving more than 200 millimeters.

North Chungcheong and North Jeolla are expected to see 50 to 100 millimeters, with some areas receiving over 150 millimeters.

Forecasted rainfall for other regions includes 10 to 60 millimeters for Seoul, Incheon, and northern Gyeonggi; 30 to 100 millimeters for southern Gyeonggi; 30 to 80 millimeters for southern Gangwon; 5 to 40 millimeters for central and northern Gangwon; 30 to 80 millimeters for Gwangju and South Jeolla; 30 to 80 millimeters for Daegu, North Gyeonggi, Busan, Ulsan, South Gyeonggi, Ulleungdo, and Dokdo; and 10 to 60 millimeters for Jeju.

In particular, flash downpours of 30 to 50 millimeters or more per hour are expected to hit narrow areas during vulnerable nighttime and early morning hours when visibility is poor and evacuation is difficult.

When rain pours at rates of 20 to 30 millimeters or more per hour over a short period, visibility drops so low that even windshield wipers are ineffective.

From tonight through the early hours of Monday, some regions will experience torrential downpours exceeding 50 millimeters per hour.

In addition, unstable atmospheric conditions will bring rain accompanied by gusty winds, thunder, and lightning, requiring caution against flooding risks in valleys, along streams, and in underpasses, as well as the overflowing of small streams.

With the ground already weakened from recent cumulative rainfall, people also need to remain vigilant against landslides and slope collapses.

Rain is also expected to fall in Gangwon Yeongdong and Jeju on September 2 and 3 due to the influence of easterly winds.