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

〈앵커〉

The rain that fell across the country yesterday (October 18) was exceptionally turbulent for autumn rain. Not only was the precipitation 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.

〈기자〉

A park in Yangcheon-gu, Seoul.

District office employees use chainsaws to cut down a tree and load it onto a truck.

Yesterday, strong winds exceeding a momentary maximum speed of 15 meters per second snapped a large, mature tree.

As the tree collapsed, it even bent a nearby steel-framed structure.

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

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

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

Dense, cold air wedged under the lower part of the warm air, allowing rain clouds to develop vertically.

Looking at actual radar imagery, you can confirm that strong bands of rain clouds formed along the front.

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

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

[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 will not be significant.

The expected precipitation is over 60mm for the mountainous areas of Jeju Island, 20 to 60mm for South Jeolla and South Gyeongsang provinces, 5 to 30mm for North Jeolla and North Gyeongsang provinces, and around 5mm for 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 Wednesday, the day after tomorrow.

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

(Photo: Yonhap News) (Video Reporter: Kim Nam-sung | Video Editor: Kim Jin-won | Design: Kim Ye-ji, Byun Da-young, Lee Ga-jin)
※ Please note: This article was translated by AI and may contain errors.