The worst yellow dust of this spring is expected to hit.
Since the 18th, yellow dust originating from the Gobi Desert and the Inner Mongolia Plateau has continued to blow into the country on westerly winds, and on Tuesday, the 21st, fine dust (PM10) concentrations are expected to be "very bad" (151㎍/㎥ or higher) in the capital region, Gangwon region, Chungcheong region, Gwangju and North Jeolla, and "bad" (81–150㎍/㎥) in the rest of South Jeolla, Yeongnam and Jeju.
Ultrafine dust (PM2.5) is expected to be at a "bad" level (36–75㎍/㎥) in the capital region and western Gangwon. An advisory-level yellow dust crisis alert was issued at 5 p.m. on the 20th for most areas, including the capital region, Gangwon, Daejeon, Sejong, North Chungcheong, South Chungcheong, Gwangju, North Jeolla, Daegu and North Gyeongsang. The advisory-level yellow dust crisis alert is issued "when the daily average concentration of fine dust due to yellow dust is expected to exceed 150㎍/㎥."
Yellow dust is already affecting air quality. In Maepo-eup, Danyang-gun, North Chungcheong, at 10 a.m. on the 20th, the 1-hour average fine dust concentration climbed to 196㎍/㎥, well above the very bad level.