On Saturday the 20th, rain is expected nationwide.
According to the Korea meteorological Administration, on the 20th very heavy rain of 30–50 mm per hour will fall mainly in South Chungcheong and western North Jeolla. Along the North Gyeongsang east coast, rain will continue until night, and in Yeongdong, Gangwon, until the morning of the 21st.
In particular, around dawn on the 20th, downpours of 20–30 mm per hour will hit nationwide.
Expected rainfall: South Chungcheong west coast, North Jeolla 30–80 mm (over 100 mm in places); Incheon and southern Gyeonggi, the five West Sea islands, southern Yeongseo in Gangwon, Yeongdong in Gangwon, the Chungcheong region, Gwangju and South Jeolla, Daegu and North Gyeongsang, western South Gyeongsang, Ulleungdo and Dokdo 20–60 mm (over 80 mm in places); Jeju Island 10–60 mm.
Rain of 10–40 mm is also expected in northern Seoul and Gyeonggi, central and northern Yeongseo in Gangwon, and in Busan, Ulsan, and South Gyeongsang.
Morning lows nationwide are forecast at 16–24 C, with daytime highs at 21–29 C. This is similar to or slightly lower than the average (morning 12–20 C; daytime 24–27 C).
Waves at sea will run 0.5–3.5 m off the east coast. They are forecast at 0.5–2.0 m off the west coast and 0.5–1.5 m off the south coast.
Wave heights in the inner offshore waters (far seas within about 200 km from the coastline) will be 1.5–3.5 m in the West Sea, 1.0–3.5 m in the East Sea, and 0.5–2.0 m in the South Sea.