On Wednesday the 18th, rain is expected in most areas nationwide.
Rain that began from dawn in southern Gyeonggi, the Chungcheong region, the Jeolla region, western Gyeongsang, and Jeju will expand to most areas from the morning. In Seoul, Incheon, and northern Gyeonggi, there will be places where raindrops of less than 0.1 mm fall in the late dawn.
In northeastern Gyeonggi and inland and mountainous areas of Gangwon, rain or snow is expected. In the afternoon, rain will stop in most areas, but it will continue along the South Sea coast and on Jeju until night.
Expected precipitation is 5–10 mm for Seoul, Incheon, Gyeonggi, Gangwon Province, Daejeon, Sejong, South Chungcheong, North Chungcheong, Daegu, and North Gyeongsang; 5–20 mm for Gwangju, northern South Jeolla, and North Jeolla; 10–30 mm for southern South Jeolla and the Busan and southern coastal areas of South Gyeongsang; 5–20 mm for Ulsan and inland South Gyeongsang; and 10–50 mm for Jeju (more than 70 mm in some mountainous areas).
With temperatures rising recently and the frozen ground thawing, the ground has weakened, and as rain falls, road or construction site subsidence, soil runoff and landslides in mountainous areas may occur, so caution is advised.
The morning low will be 1–10 degrees, and the daytime high will be 9–14 degrees.
Fine dust levels are expected to be "bad" in the Seoul metropolitan area, Yeongseo in Gangwon, and South Chungcheong, and "moderate" elsewhere. However, Seoul is expected to be "very bad" in the morning, and southern Gyeonggi in the late morning, so caution is advised.
Waves will run 0.5–1.0 meters on the East Sea nearshore and 0.5–1.5 meters on the West and South Sea nearshore. Significant wave heights in the inner offshore (open sea within about 200 km of the coastline) are expected to be 0.5–2.0 meters in the East Sea and 0.5–2.5 meters in the West and South seas.