Heavy rain, accompanied by gusts of wind, thunder and lightning, was set to expand nationwide through Friday due to the northward movement of the monsoon stationary front. As of 1 p.m. Thursday, heavy rain advisories have been issued in the Seoul metropolitan area, inland Gangwon, South Chungcheong, northern North Chungcheong and western North Jeolla provinces. The Korea Meteorological Administration forecast very he...