Tomorrow (23rd), the whole country will enter the rainy season.
Heavy rains and heat waves are expected to continue in the future.
According to the Korea Meteorological Administration, a medium-scale cyclone that descended from the north to the south will pass through the north of the central region tomorrow, and the stagnant front that stayed in the south will move northward, and heavy rain will fall across the country from the 23rd to the 24th.
Rain will continue until the morning of the 25th in parts of the southern region.
The rainy season is expected to result in heavy precipitation as the southern North Pacific high pressure temporarily supplies a lot of water vapor.
There is a possibility that the stagnant front will move south later than expected, which will increase precipitation.
In the metropolitan area, Gangwonyeongseo, Chungcheong, North Gyeongsang, Honam, Gyeongnam, inland, and Jeju, the amount of precipitation is expected to be between 30 and 100 mm.
In particular, in places where it rains a lot in northern Gyeonggi, northern Gangwonyeong, Honam, and Jeju, the amount of precipitation will be more than 120 mm.
In Yeongdong, Gangwon, southern Gyeongbuk, and Gyeongnam (excluding western inland), it will rain 10 to 70 mm.
The most intense rain is expected to be from tomorrow afternoon to the early morning of the 24th. At this time, the amount of rain falling per hour will be 30-50 mm.
From tomorrow afternoon to night, it will rain mainly in the central region, and from tomorrow night to the dawn of the 24th, the southern region will be the center of rain.
Two 'peaks' occur when low pressures pass through the central region and when stagnant fronts develop strongly in addition to low pressure.
Thunder and lightning will also accompany this rainy season.
This is because the low pressure rotates on the stagnant front formed by the confrontation of the cold, dry air from the northwest and the hot and humid air from the south, causing the two airs to collide further, making the atmosphere even more unstable.
Due to atmospheric instability, rain clouds may develop stronger in some areas due to convection, resulting in high precipitation.
This means that precipitation differences between regions can be large.
According to the Korea Meteorological Administration, there is a high risk of collapse due to sudden heavy rains while the ground is dry due to prolonged drought.
After the rainy season, on the 25th and 27th, Korea will enter the high pressure zone.
As dry air flows into the upper layer and humid air flows into the lower layer, the atmosphere is unstable across the country, and showers will occur everywhere.
Although the days are clear due to the influence of high pressure, there is a lot of moisture in the atmosphere, so the heat wave will continue as if you are in a steamer.
On the 28th and 30th, a low pressure vortex will occur in the northern part of Korea and a stagnant front will develop again below it, and heavy rain will fall mainly in the central region.
If the cyclonic vortex develops more than expected, the stagnant front will be pushed south and it will rain in the southern regions as well.
According to the Korea Meteorological Administration, in recent years, not only stagnant fronts during the rainy season, but also low pressure and stagnant fronts caused by dry air moving from the north to the south tend to affect Korea.
For this reason, rather than pouring rain sequentially as the stagnant front moves from the south to the north, it rains all over the country at once, and then there is a pattern of days without rain due to the dry air.
The Korea Meteorological Administration explained that this trend has continued until this year as well.