明起两轮大范围雨雪将至，南方进入多雨模式，北方还要降温

Group 1 - The southern region of China is entering a rainy pattern, with scattered rainfall expected today, which will significantly weaken overnight [3] - The Central Meteorological Administration forecasts moderate to heavy rain in parts of Jianghan, Jianghuai, Jiangnan, South China, and central-eastern Guizhou, with localized heavy rain and severe convective weather such as thunderstorms and hail [4] - From February 28 to March 2, a new round of widespread precipitation will affect the central and eastern regions, with stronger rainfall and convective weather expected from tomorrow night to the daytime of the 26th [5][7] Group 2 - The northern region will experience fluctuating temperatures due to frequent rain and snow, with temperatures returning to above-average levels in most areas today and tomorrow, but will drop again towards the end of February [9][12] - In contrast, the southern region, while experiencing frequent overcast and rainy conditions, will maintain slightly above-average temperatures due to the dominance of warm and humid air [11] - The transition to spring is progressing similarly to previous years in the central and northern parts of Jiangnan [11]