Core Viewpoint - The article discusses the impact of a strong cold air mass affecting various regions in China, leading to extreme weather conditions such as strong winds, temperature drops, sandstorms, and heavy rainfall, particularly in the central and northern parts of the country [1][2][3]. Weather Warnings and Predictions - The Central Meteorological Observatory issued multiple weather warnings, including orange alerts for strong winds and blue alerts for snow and rain, indicating a complex weather situation in central and eastern China [1][2]. - From April 11 to 12, temperatures in central and eastern China are expected to drop by 6°C to 10°C, with some areas experiencing drops of 12°C to 16°C [1][2]. Wind and Temperature Effects - The northern regions, particularly North China, are experiencing historically rare persistent strong winds, with average wind speeds of around 6 levels and gusts reaching 9 to 11 levels, and in some mountainous areas, gusts may reach 13 levels [2][5]. - The cold air mass is expected to cause significant temperature drops and strong winds, which could impact agricultural production, particularly for crops like spring corn and rice [3][4]. Sandstorm and Rainfall Impact - Most areas north of the Yangtze River are affected by sandstorm conditions, with regions like southern Xinjiang and western Inner Mongolia experiencing sandstorms and even severe sandstorms in some localities [2][3]. - Southern regions are warned of severe weather, including heavy rain and thunderstorms, with localized areas potentially receiving over 100 millimeters of rainfall [3][4]. Urban Weather Effects - Beijing issued its first orange alert for strong winds in nearly a decade, with expected wind speeds that could cause significant damage, particularly in urban areas where the "narrow tube effect" may amplify wind speeds [5][6]. - The article explains the "narrow tube effect," where wind speeds can increase significantly in urban environments, posing risks to public safety [7][9]. Agricultural Impact - The extreme weather conditions are likely to affect the planting of spring crops, necessitating careful planning to avoid adverse weather conditions during sowing [3][4].