中央气象台：北方沙尘天气减弱消散

Core Viewpoint - The sandstorm weather in northern China has weakened and dissipated, leading to the lifting of the blue alert for sandstorms, although some areas will still experience dust weather [1]. Group 1: Weather Conditions - The air diffusion conditions in the Beijing-Tianjin-Hebei region are generally good for the upcoming week [2]. - In the Yangtze River Delta region, dust weather is expected due to upstream transmission, but it will gradually weaken and dissipate starting from the night of February 23 [3]. - The Fenwei Plain will experience dust weather on February 23, with general air diffusion conditions from February 24, and light haze in the Guanzhong area of Shaanxi [3]. - The Central China region will have multiple precipitation events, leading to good air diffusion and wet removal conditions overall for the week [4]. - The Pearl River Delta region will have generally good air diffusion conditions with no significant haze [5]. - The Southwest region will also see good air diffusion and wet removal conditions, with intermittent light haze in the southern part of the Sichuan Basin [6]. - The Northeast region will have good air diffusion and wet removal conditions, with intermittent haze in the central area [7]. - In the Northwest region, some areas in the southeastern part will experience dust weather, while the northern slope of the Tianshan Mountains in Xinjiang will have general air diffusion conditions and light haze [8].