South Korea expects heavy rain tonight following a day of scattered showers across Seoul and other inland areas [1].
These weather patterns pose a risk of flash flooding and infrastructure strain in the central region, where rain clouds are expected to intensify overnight.
YTN weather caster Lee Hye‑min said that while rain had slowed in many inland areas during the day, rain clouds will develop strongly again starting tonight [1]. The precipitation is driven by a stationary front that is redeveloping over the region [1].
Forecasters have identified several high-risk zones. Heavy rainfall is expected in southern Gyeonggi, parts of the central region, North Jeolla, and North Gyeongsang [1]. In some of these areas, specifically southern Gyeonggi and other central districts, rainfall could reach a maximum of 50 mm per hour [1].
Lee said the weather had been characterized by sporadic showers throughout the weekend [1]. The shift toward heavier precipitation tonight marks a significant increase in intensity compared to the daytime activity.
Local authorities typically monitor these stationary fronts closely because they can cause prolonged periods of heavy rain in concentrated areas, often leading to landslides or urban flooding in low-lying districts [1]. Residents in the affected provinces are advised to prepare for the sudden increase in water volume during the overnight hours.
“Rain clouds will develop strongly again starting tonight”
The redevelopment of a stationary front often leads to 'linear precipitation zones,' where heavy rain remains concentrated over a specific area for hours. A rate of 50 mm per hour is considered heavy rain, which can quickly overwhelm urban drainage systems in cities like Seoul and the surrounding Gyeonggi province.
