[Tomorrow's Weather] Overcast Nationwide with Heavy Rain... Up to 150mm or More in the Capital Area

On Saturday the 21st, the entire country will be cloudy with heavy and widespread rain in most areas.

According to the Korea Meteorological Administration, the expected rainfall on the 20th and 21st is 30 to 100 mm in Seoul, Incheon, Gyeonggi, and the five western islands (with heavier amounts exceeding 150 mm in southern Gyeonggi and over 120 mm in northern Seoul, Incheon, and Gyeonggi), and 30 to 100 mm in inland Gangwon (with heavier amounts exceeding 150 mm in central and southern inland areas and over 120 mm in northern inland areas).

On the 20th, when rain fell nationwide, citizens walked with umbrellas in Yeouido Park, Seoul. The Korea Meteorological Administration forecasted that after heavy rain continues until the 21st, the heat will ease. Photo by Hyunmin Kim kimhyun81@

Over the three days until the 22nd, 100 to 200 mm of rain (with heavier amounts up to 300 mm) will pour on the eastern coast and mountainous areas of Gangwon; 50 to 100 mm (with heavier amounts exceeding 150 mm) in Daejeon, Sejong, South Chungcheong, and North Chungcheong; 30 to 80 mm (with heavier amounts over 120 mm in the southern coast of Jeolla, northern Jeonbuk, over 150 mm in Jeju mountainous areas, and over 100 mm in Jeju mid-mountain areas) in Gwangju, South Jeolla, North Jeolla, and Jeju (excluding northern Jeju); 10 to 50 mm in northern Jeju; and 50 to 120 mm (with heavier amounts exceeding 180 mm) in Busan, Ulsan, South Gyeongsang, Daegu, North Gyeongsang, Ulleungdo, and Dokdo.

With heavy rain already falling nationwide, very heavy rain of 30 to 50 mm per hour (with stronger amounts over 60 mm per hour on the eastern coast and mountainous areas of Gangwon) is expected in the Seoul metropolitan area until dawn on the 21st, in Gangwon until the afternoon, and in the Chungcheong region until noon, so caution is advised to prevent safety accidents.

Rainfall of 30 to 50 mm per hour (around 30 mm in other areas of Jeolla) is expected until night in the southern coast of South Jeolla and northern North Jeolla, and from morning to afternoon in the mid-mountain and mountainous areas of Jeju.

The morning low temperature is forecast to be between 16 and 26 degrees Celsius, and the daytime high temperature between 19 and 30 degrees Celsius. Fine dust levels will be 'Good' nationwide due to smooth atmospheric dispersion and the influence of rain.

Strong wind warnings have been issued for Jeju mountainous areas and parts of the South Jeolla coast. From dawn, very strong winds with gusts exceeding 70 km/h will blow in Busan, Ulsan, and the southern eastern coast of North Gyeongsang; from morning in the South Jeolla coast; and from afternoon in the southern coast of South Gyeongsang. Winds with gusts exceeding 55 km/h will also blow strongly along other coastal areas.

For the time being, winds in Jeju mountainous areas will be very strong with gusts exceeding 90 km/h. In the southern part of the southern Yellow Sea, Jeju waters, southwestern sea of the South Sea, outer eastern sea of the South Sea, and central East Sea, winds will blow very strongly at speeds of 30 to 80 km/h until the 23rd, with very high waves. Most seas will experience gusts accompanied by thunder and lightning in some areas.

Sea waves will range from 1.5 to 4.5 meters in the East Sea nearshore, and 1.0 to 3.5 meters in the nearshore areas of the Yellow Sea and South Sea. Wave heights in the outer seas (about 200 km from the coastline) are predicted to be 1.5 to 5.0 meters in the East Sea, 1.0 to 5.0 meters in the Yellow Sea, and 1.5 to 4.0 meters in the South Sea.