Jeju, South Coast, and Gyeongnam up to 150mm until the 19th... Rain → Heatwave → Rain Repeats

Passing low pressure developed in the stationary front brings heavy rain to southern regions
Jeju mountains, Jeonnam South Coast, Gyeongnam Coast up to 150mm
Heavy rain warnings expected, prepare for intense rain of 30-50mm per hour
Jeju and Jeonnam South Coast from early morning to evening on the 18th, Gyeongnam Coast from afternoon on the 18th to early morning on the 19th
Heatwave from the morning of the 19th, stationary front reactivates after the 21st

On the 13th, when a heavy rain warning was issued for the central region, citizens were holding onto their umbrellas and moving along Yeouidaero in Seoul. Photo by Jinhyung Kang aymsdream@

[Asia Economy Reporter Han Jinju] From today until Tuesday morning, the 19th, heavy rain of up to 150mm will fall mainly in the southern regions. After the rain stops, the heatwave will continue, and the monsoon rain is expected to return after the 21st.

On the 17th, the Korea Meteorological Administration held an occasional briefing and announced that a low-pressure system developed from the stationary front will pass through the southern regions, causing cloudy skies and rain nationwide, with particularly heavy and intense rain centered on Jeju Island and the southern coast.

From the night of the 17th to the morning of the 19th, due to topographical effects, the southern coast of Jeollanam-do, the coastal areas of Gyeongsangnam-do, and the mountainous areas of Jeju Island are expected to receive over 150mm of rain, while the southern regions except for the Gyeongbuk area and Jeju will see about 30 to 100mm. The southern Chungcheong region and Gyeongbuk area will have 20 to 80mm, southern Gyeonggi and central to southern Gangwon, and northern Chungcheong will get 5 to 40mm, and Seoul, northern Gyeonggi, and northern Gangwon will receive around 5mm of rain.

In areas where the stationary front remains, heavy rain accompanied by gusts and thunder/lightning will fall at a rate of 30 to 50mm per hour or more. Jeju Island and the southern coast of Jeollanam-do will experience heavy rain from dawn to evening on the 18th, and the coastal areas of Gyeongsangnam-do will have concentrated heavy rain from the afternoon of the 18th to the early morning of the 19th. Waves over 4 meters high will rise in the southern and eastern seas, and on the 18th, astronomical and meteorological tides will combine, so caution is needed for coastal safety accidents during high tide times.

Park Jung-hwan, a forecast analyst at the Korea Meteorological Administration, explained, "Strong southerly winds carrying moisture collide with the terrain, and hot and humid air from the south strongly flows into the front of the low pressure, causing heavy rain in Jeju and the southern coast. Heavy rain warnings may be issued for Jeju and the southern coast of Jeollanam-do at dawn on the 18th, and for the coastal areas of Gyeongsangnam-do and the eastern coast of Jeollanam-do in the morning of the 18th. Precautions should be taken against flooding in low-lying and coastal areas, and safety accidents such as valley water due to river overflow."

From the morning of the 19th, after the monsoon rain passes, the heatwave will continue until the 20th. Dry air will flow in from the north, and a high-pressure system will settle over the West Sea, resulting in generally clear skies. As the ground surface heats up, the heatwave is expected to intensify mainly in inland areas.

From the 21st, the stationary front will become active again, bringing rain. Around the 19th, the stationary front will reactivate in southern China and move eastward, affecting the Korean Peninsula from the 21st. After the 21st, the upper atmospheric pressure system will stagnate, increasing the likelihood of periodic monsoon rains caused by the stationary front. However, the weather on the 21st and 22nd will be highly variable depending on the position of the low pressure, so it is advised to refer to the weather forecast after the 19th.

Forecaster Park explained, "The stationary front will be periodically activated over the Korean Peninsula, causing rain, but there is significant variability. During the rain, the heatwave will temporarily ease, but once it stops, the heat will continue again."

This content was produced with the assistance of AI translation services.