An officer worker builds snowmen during lunch time in Seoul, Dec. 21. Yonhap

Snow will continue in the wider Seoul area and central inland regions into Wednesday afternoon, the state weather agency said, forecasting up to 15 centimeters in some areas.

Snow began falling earlier in the day, accompanied by strong wind, and even thunder and lightning in some regions, the Korea Meteorological Administration (KMA) said.

Cars move slowly on a motorway in Seoul, Dec. 21. Yonhap

Heavy snow advisories have been issued for the capital area, excluding southern areas of Gyeonggi Province, inland and mountainous areas of Gangwon Province, and other inland regions.