返程先看天气，这些区域将有暴雨大暴雨

Summary of Key Points Core Viewpoint - The article discusses significant temperature drops and precipitation changes across various regions in China, highlighting the need for public awareness and preparedness for weather-related impacts. Group 1: Temperature Changes - A notable temperature drop is expected in the Huanghuai region, with areas like Henan experiencing a decrease of 8 to 14°C, leading to maximum temperatures around 10°C [1] - Northeastern regions will see maximum temperatures fall below freezing, with some areas experiencing drops of 12 to 20°C [1] - For instance, Zhengzhou's temperature is projected to drop from 27.7°C to 10°C in a single day, indicating a significant temperature contrast [1] Group 2: Precipitation Developments - Rainfall is expected to increase in southern regions, with areas like Jiangnan and Huazhong experiencing moderate to heavy rain, and localized heavy rainfall possible in places like Hunan and Chongqing [2] - The Central Meteorological Observatory forecasts small to moderate snow or sleet in northern regions, with some areas experiencing heavy snow [2] - A new round of widespread rainfall is anticipated to begin shortly, affecting Jiangnan and Huazhong regions, which may lead to adverse weather conditions [4]