[Anchor]
The rain that drenched the country yesterday (October 18) was unusually fierce for autumn. Not only was the rainfall heavy, but the winds were reminiscent of a typhoon. Temperatures are also forecast to drop sharply starting the day after tomorrow.
Reporter Seo Donggyun will explain in detail why there is such high weather volatility.
[Reporter]
At a park in Yangcheon-gu, Seoul.
District office employees use chainsaws to cut up a tree and load it onto a truck.
Yesterday, sudden gusts exceeding 15 meters per second snapped large, mature trees.
As the tree fell, it even bent surrounding steel frame structures.
Yesterday, typhoon-level winds exceeding 30 meters per second slammed into 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 temperature and water vapor content 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 burrowed beneath the warm air, allowing rain clouds to develop vertically.
Looking at actual radar imagery, you can see 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, unleashing 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 parts of the southern regions, the amount of rainfall will not be large.
Expected precipitation 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 greater Seoul area.
After the rain stops, cold air will move south from the northwest, causing temperatures to drop starting the night of Wednesday, the day after tomorrow.
The Korea Meteorological Administration forecasted that morning temperatures in Seoul on Thursday, three days from now, will plunge to 4°C (39°F).
(Video reporting: Kim Nam-sung | Video editing: Kim Jin-won | Design: Kim Ye-ji, Byun Da-young, Lee Ga-jin)
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