[Anchor]
Heavy rain that began last night (July 14) has led to the issuance of a flood advisory for the Neobudae Bridge area of Mokgamcheon Stream in Seoul. With concerns over rain-related damage in various parts of the metropolitan area, we will discuss why such heavy rainfall is occurring with Seo Donggyun from our weather team.
Reporter Seo, strong wind and rain are still lashing the region. What is the cause?
[Reporter]
First, let us take a look at CCTV footage from Gangwon Province, where the strong wind and rain are passing through.
This is the Yeongdong Line in Wonju.
In the CCTV footage, you can see intense streaks of rain pouring down under the streetlights.
In the metropolitan area, the strongest rain clouds are gradually moving out, but because the area has already been hit by intense wind and rain, a flood advisory was issued for Mokgamcheon Stream, which flows through Guro-gu, Seoul, and Gwangmyeong, Gyeonggi Province.
Let us look at how much rain has fallen.
This shows the cumulative precipitation over the past 12 hours, and you can see that a significant amount of rain has poured down, centered around the metropolitan area.
In particular, Incheon has seen over 100mm of rain so far.
This is because a low-pressure system originating from Typhoon Bavi is passing over the West Sea and affecting the country, primarily the metropolitan area.
As dry air enters the rear of the low-pressure system and meets it, the system has become more organized and transformed into an extratropical cyclone, which is causing even heavier rain.
Therefore, 30 to 50mm of rain per hour is forecast for northern Gyeonggi and northern Gangwon overnight, with 20 to 30mm per hour expected in other parts of the central region and North Jeolla Province.
When rainfall exceeds 30mm per hour, it is difficult to maintain visibility while walking, so extreme caution is required to prevent safety accidents.
The wind is also a problem.
This data shows how strong the winds are; the areas marked in green on the map indicate where strong winds are blowing.
The entire country is currently marked in green, meaning very strong winds are blowing nationwide.
In Incheon, where heavy rain fell earlier, typhoon-level gusts exceeding 20 meters per second were recorded at one point during the night.
The reason for these strong winds is that air is flowing toward Korea from the low-pressure system that brought the rain clouds, and air is also flowing in the same direction from a high-pressure system in the south.
As heavy rain and strong winds are occurring simultaneously, caution is needed regarding the management of facilities.
Once this rain stops, the monsoon front will become active again starting Thursday afternoon, primarily affecting the southern regions.
This monsoon front will have an impact throughout the weekend, so rain is expected across the country all weekend long.
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