Up to 150mm More Rain in the Seoul Metropolitan Area by Morning of the 1st... Heatwave and Tropical Nights Expected on the Weekend

Stationary Front Moving North Bringing Heavy Rain to Seoul Metropolitan Area Until the 1st
Localized Showers Including Southern Chungcheong and Southern Regions
Heatwave and Tropical Nights Nationwide Due to North Pacific High on the 2nd-3rd
Monsoon Rain in Southern Regions and Showers in Central Regions from the 4th to 6th

Due to the influence of the monsoon front, a heavy rain warning was issued for the Seoul metropolitan area on the 30th, and a vehicle is creating a spray of water near Jeungsan Bridge in Seoul. Photo by Kang Jin-hyung aymsdream@

[Asia Economy Reporter Han Jinju] More than 150mm of rain is expected to fall in the Seoul metropolitan area, where heavy rain has poured, by tomorrow morning. After the rain stops, heatwaves and tropical nights will prevail until the weekend, followed by rain nationwide again next week.

On the 30th, the Korea Meteorological Administration held an occasional briefing and forecasted that as the stationary front moves north from the afternoon of the day to the 1st, more than 150mm of rain will fall in many parts of the Seoul metropolitan area. As the North Pacific high-pressure system expands and the stationary front moves north, heatwaves continue in the southern regions, while heavy rain persists in the central regions.

Expected rainfall until the 1st is 50-100mm in the Seoul metropolitan area and inland/mountainous areas of Gangwon, 20-70mm in northern Chungcheong and northern inland Gyeongbuk, and 5-40mm along the east coast of Gangwon. On the 30th, southern Chungcheong and southern regions will experience showers of about 5-40mm due to the influence of the North Pacific high-pressure system.

Forecaster Woo Jin-gyu explained, "Although the rainfall amount is less than the rain that fell until this morning, the rain may intensify again between night and morning. Due to the weakened ground from the heavy rain, if additional rain falls, the risk of landslides increases, and there is a high possibility of ground collapse or erosion, so caution is required."

Due to the influence of the monsoon front, a heavy rain warning was issued for the Seoul metropolitan area on the 30th, and the Bulgwangcheon Stream walking trail in Seodaemun-gu, Seoul, is being flooded. Photo by Jinhyung Kang aymsdream@

From the 2nd to the 3rd, after the monsoon rain stops, the entire country will be under the influence of the North Pacific high-pressure system, bringing heatwaves. Along with hot and humid air and surface heating, heatwaves and tropical nights will occur nationwide except for some areas in Gangwon Province.

From the 4th to the 6th next week, the stationary front will redevelop and bring heavy rain. The stationary front will be active in the southern regions, causing heavy rain, while showers will fall in the central regions.

A low-pressure cyclone, the very early stage of a typhoon, is approaching the southern sea, positioning itself west of the North Pacific high-pressure system located in the southern regions, creating a southerly wind flow. This strong southerly wind flow causes the stationary front to redevelop over the southern sea. The southerly wind lifts a large amount of water vapor, so a significant amount of rain is expected. The effective precipitation amount (the amount of water vapor in the entire atmospheric column), which is used as a standard for heavy rain warnings, is about 40mm, but during this period, it is expected to reach 60mm, indicating the possibility of heavy rain.

Forecaster Woo explained, "Although the low-pressure cyclone is much smaller in scale than a typhoon, it supplies a large amount of water vapor when moving north toward Korea, which can increase the amount of rain. Because a very large amount of water vapor is involved, heavy rain will fall in the southern regions at the start of precipitation, and the central regions may experience heavy rain on the 5th and 6th."

After the 7th, there is a possibility of heavy rain. On the 7th, Typhoon No. 3 Chaba is expected to make landfall over the southern sea in the form of a tropical cyclone, one level below a typhoon. Since a large amount of water vapor has already been supplied, additional water vapor accompanying it could increase the amount of rain.

Forecaster Woo said, "Because a large amount of water vapor will accompany after the 7th, the amount of rain will increase, and the additional inflow of water vapor is a dangerous factor. Rainfall will continue over many areas to the extent that it will be difficult to distinguish between convective rainfall and rainfall caused by the stationary front."

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