According to the National Hydrology Meteorology Forecast Center, the temperature in the northern mountainous provinces dropped down 10 degrees Celsius.
The lowest temperature in the north part of the central region was measured at 11- 15 degrees Celsius.
Since today, the cold air mass begins operating strongly and spreading out the southeastern provinces.
The southern and southeastern regions will experience fogy and cold weather.
Meanwhile, typhoon Kai-tak is forecast entering the southern territorial waters of the East Sea.