中央气象台：北方地区有沙尘天气

Core Viewpoint - The article discusses the sandstorm weather conditions affecting various regions in China, with specific warnings and forecasts issued by the Central Meteorological Observatory. Group 1: Weather Forecasts - From February 22, 20:00 to February 23, 20:00, areas including southern Xinjiang, central and eastern Gansu, Ningxia, northern Shaanxi, southern Shanxi, southern Hebei, southern Shandong, Henan, northern Hubei, northern Jiangxi, Anhui, Jiangsu, Shanghai, northern Zhejiang, southern Jilin, and northern Liaoning are expected to experience sand or dust weather [1] - In the Beijing-Tianjin-Hebei region, sand or dust weather is anticipated on the night of February 22, with better atmospheric diffusion conditions expected from February 23 [3] - The Yangtze River Delta region will see sand or dust weather from the night of February 22 to February 23, gradually diminishing due to precipitation starting February 23 night [3] - The Fenwei Plain will also experience sand or dust weather from February 22 night to February 23, with general atmospheric diffusion conditions expected from February 24 [3] Group 2: Regional Impacts - In Central China, areas including most of Hubei and northern Hunan will experience sand or dust weather on the night of February 22, which will gradually dissipate due to precipitation on February 23 [4] - The Pearl River Delta region is forecasted to have good atmospheric diffusion conditions over the next week, with no significant smog expected [5] - The Southwest region will have generally good atmospheric diffusion and wet removal conditions, with intermittent light haze in southern Sichuan Basin [6] - In Northeast China, sand or dust weather is expected in the central and southern parts on the night of February 22, with good atmospheric diffusion conditions anticipated over the next week [7] - The Northwest region, including southern Xinjiang and central and eastern Gansu, will experience sand or dust weather from February 22 night to February 23, with general atmospheric diffusion conditions expected in the following week [8]