"More Rain Ahead" and Temperatures to Plunge... What's Behind the "Typhoon-Level Gales and Rain"?

[Anchor]

The rain that drenched the entire country yesterday (October 18) was exceptionally disruptive for a typical autumn rain. Not only was the rainfall heavy, but the winds were also reminiscent of a typhoon. Temperatures are forecasted to plunge starting the day after tomorrow.

Reporter Seo Donggyun will explain in detail why there is such high weather volatility.

[Reporter]

A park in Yangcheon-gu, Seoul.

District office workers are cutting down a tree with a chainsaw and loading it onto a truck.

Strong winds exceeding a momentary speed of 15 meters per second blew yesterday, snapping large trees.

As the falling trees collapsed, even surrounding steel structures were bent.

Yesterday, typhoon-level winds exceeding 30 meters per second swept through areas like Chungcheong and Incheon, while torrential downpours of over 50 millimeters per hour battered Seoul and South Jeolla Province.

This is a weather map showing the temperatures and water vapor levels of air masses.

As a low-pressure system passed north of South Korea, air masses with different characteristics met, forming a cold front.

Dense, cold air burrowed beneath the warm air, allowing rain clouds to develop strongly in a vertical direction.

Looking at actual radar imagery, one can see that intense rain cloud bands were generated along the front.

In addition, strong southwesterly winds blew between the northern low-pressure system and the eastern high-pressure system, whipping up fierce wind and rain.

Rain will affect the entire country once more tomorrow and the day after.

[Lee Kwang-yeon / Forecaster, Korea Meteorological Administration : As water vapor flows in along the edge of the high-pressure system and cold air descends from the north, (rain is expected) mainly in areas south of Chungcheong on Tuesday, October 20, and in the central regions on Wednesday morning, October 21.]

However, aside from some southern regions, the amount of rainfall is not expected to be large.

Expected rainfall is over 60mm in the mountainous areas of Jeju Island, 20 to 60mm in South Jeolla and South Gyeongsang provinces, 5 to 30mm in North Jeolla and North Gyeongsang provinces, and around 5mm in other regions including the Seoul metropolitan area.

After the rain stops, cold air will move down from the northwest, causing temperatures to drop starting the night of the day after tomorrow, Wednesday.

The Korea Meteorological Administration forecasted that morning temperatures in Seoul on Thursday, three days from now, will plunge to 4°C (39°F).

(Photo: Yonhap News)
Reported by Seo Donggyun | Video by Kim Nam-sung | Video Editing by Kim Jin-won | Graphics by Kim Ye-ji, Byeon Da-young, Lee Ga-jin
※ Please note: This article was translated by AI and may contain errors.