Today (August 23) marks Cheoseo, the solar term when summer heat supposedly fades and refreshing autumn begins.

However, the sweltering heat made that description feel completely out of place.

This is because the North Pacific high pressure has expanded further over the Korean Peninsula.

A heatwave advisory has been reissued for Seoul, and heatwave warnings and advisories are now in effect across almost the entire country, with the exception of some mountainous areas in Gangwon Province.

Tomorrow will be just as hot as today.

The sensible temperature in Seoul is expected to reach 33°C (91°F), while Gimje, currently under a heatwave warning, is projected to see felt temperatures soar up to 36°C (97°F).

As temperatures near the surface rise during the day, atmospheric instability will intensify.

Tomorrow, sudden showers are expected in parts of the northeastern inland areas of Gyeonggi Province, the mid-northern inland areas of Gangwon Province, southern Chungcheong Province, other southern regions, and Jeju Island.

Until this evening, shower clouds may develop in the northeastern inland areas of Gyeonggi Province, the northern inland areas of Gangwon Province, and Jeju Island.

Tomorrow morning, temperatures will start at 25°C (77°F) in Seoul and 26°C (79°F) in Busan, with tropical nights persisting in various regions. Daytime highs are forecast to reach 33°C (91°F) in Seoul and 35°C (95°F) in Daegu, with sensible temperatures feeling even higher than the actual readings.

Meanwhile, Typhoon Saudelor, the 18th typhoon, is projected to head toward China. However, as significant variability remains, we will need to monitor the situation a bit longer to see what kind of impact it might have on South Korea.

(Reported by Weather Forecaster Ahn Soo-jin)