Starting from the afternoon of the 16th, heavy rain is forecasted nationwide. In particular, regions including the metropolitan area, Gangwon, Chungcheong, and Jeonbuk will receive rainfall of 30 to 50 mm per hour.
According to the Korea Meteorological Administration on the 15th, intense rain is forecasted to hit southern Gyeonggi, southern Gangwon, and Chungcheong from the afternoon of the 16th. From the evening of the 16th to the morning of the 17th, heavy rain is also expected in Jeonbuk, in addition to the aforementioned areas. After the afternoon of the 17th, the areas receiving rain will expand to include southern regions and Jeju.
The expected rainfall from the 16th to the 17th is ▲Metropolitan area and Chungcheong 50 to 150 mm (with southern Gyeonggi and Chungnam west coast possibly exceeding 200 mm) ▲Gangwon inland and mountainous areas, Chungbuk 50 to 100 mm (with central and southern Gangwon inland possibly exceeding 150 mm) ▲Jeonbuk 30 to 100 mm (with northwestern parts possibly exceeding 150 mm) ▲Busan, Ulsan, Gyeongnam, and northwestern Gyeongbuk inland 30 to 80 mm ▲Gwangju, Jeonnam, Daegu, Gyeongbuk inland, northeastern Gyeongbuk mountain areas, Ulleungdo, and Dokdo 10 to 60 mm (with northern Jeonnam west coast possibly exceeding 80 mm) ▲Oering 10 to 40 mm ▲East coast and Jeju 5 to 40 mm.
This rain is expected to continue until Saturday, the 19th. However, after the rain stops, the North Pacific High will expand its force, bringing about a heat wave. The Korea Meteorological Administration noted, "Even after the heat wave is forecasted for the 20th, there will be a lot of moisture in the atmosphere, leading to unstable conditions and frequent showers in the afternoon hours."
Meanwhile, the Korea Meteorological Administration analyzed the rain from the 16th to the 19th as monsoon rain. This follows nearly two weeks of persistent heat wave, bringing the monsoon rains back to life. Earlier, the Korea Meteorological Administration declared the "end of the monsoon" for Jeju and the southern regions on the 26th of last month and the 1st of this month, respectively. In relation to this, the Korea Meteorological Administration explained, "The rain in the southern regions and Jeju is influenced more significantly by tropical moisture, so the end date of the monsoon will not change," adding that the end of the monsoon has not yet been declared for the central region.
If forecasts hold true, the end date of the monsoon for the central region will move past at least the 19th of this month, making this year's monsoon record the most significant difference in duration between the central and southern regions since statistics began in 1973.