大寒！上海、杭州下雪上热搜；河南暴雪冻雨，8000人滞留郑州机场，41条高速全线禁止车辆上站；武汉暴雪预警，部分学校停课！专家提醒

Group 1 - A cold wave is affecting multiple regions in China, bringing heavy snow and freezing rain, with precipitation levels ranging from 5 to 15 mm in several areas, and some places experiencing up to 22 mm [1][33] - The cold wave coincides with the solar term "Major Cold," marking the coldest period of the winter, with temperatures expected to drop significantly across southern regions [1][43] - Major cities like Shanghai and Hangzhou have reported snowfall, with social media buzzing with images and reactions from residents [4][27] Group 2 - In Henan province, heavy snowfall has led to the closure of 41 highways and significant disruptions at Zhengzhou Airport, where around 8,000 passengers were stranded due to flight delays [33][36] - Wuhan has issued multiple weather warnings, including a yellow alert for snow, with schools implementing flexible schedules to ensure student safety [39][41] - Meteorological experts indicate that this winter's cold wave is particularly severe, with temperatures dropping to around freezing in many areas, and warnings issued for potential ice accumulation on roads and power lines [43][44]