The Korea Meteorological Administration forecast that easterly winds will bring hot, dry air and heavy rain to western South Korea this week [1].
This weather shift marks an early onset of extreme summer heat and potential flooding, creating a volatile environment for residents in the western regions and the capital city.
The agency said a shift to easterly winds is pushing hot, dry air over mountain ranges, which is raising temperatures across the west. In Seoul, the daytime temperature is expected to reach 30 °C today [1] and climb to 33 °C tomorrow [1]. These figures are approximately five °C above the average [1].
Nighttime temperatures are also expected to exceed 20 °C [1]. The Korea Meteorological Administration said that heat at the level of a heat wave will continue from the start of summer [1].
Simultaneously, the region faces the threat of heavy precipitation. Typhoon Jangmi is currently located in the waters southwest of Okinawa, Japan [1]. The storm is maintaining a strong Category 3 intensity as it moves north toward the southeastern waters of Japan [1].
Meteorologists said the cloud band from Typhoon Jangmi is expected to bring significant rainfall to western South Korea. The combination of high temperatures and the typhoon's moisture is creating an unstable atmospheric pattern across the peninsula [1].
“Seoul daytime temperature today 30 °C, tomorrow 33 °C”
The simultaneous occurrence of a heat wave and a Category 3 typhoon indicates a high-energy atmospheric state. The interaction between the dry, easterly winds and the moisture-rich cloud bands of Typhoon Jangmi increases the risk of sudden, severe weather shifts, which can complicate urban drainage and public health management in densely populated areas like Seoul.
