春运返程前，中央气象台连发双预警

Core Viewpoint - The Central Meteorological Administration of China has issued blue alerts for strong winds and sandstorms due to a strong cold air mass affecting various regions from February 20 to 22, coinciding with the peak of the Spring Festival travel period, necessitating public precautions for outdoor activities [1][2]. Group 1: Weather Alerts - A blue alert for strong winds indicates that from 08:00 on February 20 to 08:00 on February 21, areas in northern and eastern Xinjiang, central and western Inner Mongolia, and parts of Gansu, Ningxia, and Shaanxi will experience winds of 5 to 7 levels, with gusts reaching 8 to 10 levels [1]. - In specific regions such as the mountain passes of Xinjiang and western Inner Mongolia, local wind speeds may reach level 8, with gusts around level 11 [1]. Group 2: Sandstorm Alerts - The blue alert for sandstorms indicates that during the same period, eastern and southern Xinjiang, western Inner Mongolia, western Gansu, and northern Ningxia will experience dust storms, with some areas facing severe sandstorms [2]. Group 3: Precipitation and Health Precautions - Rain and snow are expected to have a limited impact today, primarily affecting northern and eastern Xinjiang, northeastern and central Inner Mongolia, and parts of Tibet, with light to moderate snow or rain-snow mixtures [4]. - Starting February 21, significant snowfall is anticipated in eastern Inner Mongolia and northeastern regions, with increased rainfall in southern areas [4]. - Meteorological experts advise caution regarding firework displays and forest fire sources in regions like Xinjiang, Gansu, Ningxia, and others due to strong winds, and highlight the health risks posed by dust and severe temperature drops [4].