今年首场寒潮来袭 南方地区尤需防范冻雨风险

Core Viewpoint - The first cold wave of the year is expected to bring significant rain, snow, and freezing weather to the central and eastern regions of China, with temperatures dropping by 6 to 10 degrees Celsius, particularly affecting southern areas where snow and freezing rain are anticipated [1][2]. Summary by Sections Weather Impact - The cold wave will affect China from January 17 to 21, with widespread temperature drops of 6 to 10 degrees Celsius across most regions, and significant impacts in southern areas [1]. - The central meteorological station has issued a blue alert for the cold wave, and a level four emergency response has been activated due to the anticipated severe weather [1]. Regional Differences - The cold wave's impact will vary significantly by region, with northern areas like Northeast China and Beijing-Tianjin-Hebei experiencing less severe effects, while southern regions will face more substantial impacts [2]. - In the Yangtze River basin, temperature drops could exceed 12 degrees Celsius, with localized areas experiencing drops of up to 16 degrees Celsius [2]. Precipitation Characteristics - The cold wave will bring complex precipitation patterns, including rain transitioning to sleet, freezing rain, and snow, particularly in areas south of the Qinling-Huaihe line [2]. - The risk of freezing rain is highlighted as being significantly higher than that of heavy snow, with potential for severe disruptions to transportation and power infrastructure [2]. Agricultural Concerns - The Ministry of Agriculture and Rural Affairs, along with the China Meteorological Administration, has issued warnings regarding frost damage risks to winter wheat and rapeseed crops, advising farmers to take preventive measures [2][3].