中东部新一轮雨雪天气将至，东北江南升降温幅度大

Core Viewpoint - A new round of rain and snow weather is expected to develop in China's central and eastern regions, with significant snowfall anticipated in parts of the northeast, necessitating public awareness for travel safety [5]. Weather Conditions - The central meteorological station forecasts that from December 21 to 24, two cold air masses will affect China, leading to fluctuating temperatures across various regions [6]. - Yesterday, significant rain and snow were observed in the southern regions, while snowfall decreased in the north, primarily occurring in Xinjiang and other areas [1]. - Today, snowfall is expected to increase in Xinjiang, while the central and eastern regions will experience less precipitation [1]. Regional Forecasts - Tomorrow, light snow or sleet is expected in areas such as southern Xinjiang, Gansu, northern Shaanxi, and parts of the northeast and northern China, with some regions in southern Xinjiang anticipating moderate to heavy snow [2]. - The day after tomorrow, light to moderate snow or sleet is forecasted for northeastern regions, with heavy snow and local blizzards expected in parts of Heilongjiang, Jilin, and Liaoning [4].