Core Viewpoint - The Central Meteorological Administration forecasts that most regions in the country will experience weak precipitation today, with rising temperatures, particularly in North China and the Huang-Huai area, which are entering a period of widespread high temperatures. A new round of rainfall is expected to begin tomorrow night, primarily affecting the central and lower reaches of the Yangtze River [1] Summary by Relevant Sections - Weather Conditions - Most areas in the country are experiencing weak precipitation today [1] - Temperatures are continuing to rise, with significant high temperatures noted in North China and the Huang-Huai region [1] - Upcoming Weather Events - A new round of rainfall is set to begin tomorrow night [1] - The central and lower reaches of the Yangtze River will be the core areas affected by this rainfall [1]

Group 1 - The central region of China, particularly the Yangtze River middle and lower reaches, is experiencing significant rainfall, with heavy rain expected to continue over the holiday period [1][2][5] - The rain is forecasted to shift southward, affecting regions in South China, with warnings for potential severe weather including thunderstorms and strong winds [2][5] - The northeastern region is experiencing a cooling trend due to the movement of cold air, contrasting with the hot and humid conditions in South China, where temperatures may feel above 40°C [6] Group 2 - Specific areas such as Anhui, Zhejiang, and Jiangxi are currently facing heavy rain and localized flooding, with some regions reporting extreme weather conditions [2][5] - The forecast indicates that the heavy rainfall will persist in the central and southern parts of China, with warnings for potential flash floods and landslides in vulnerable areas [3][4] - The temperature fluctuations in northern regions are notable, with cities like Harbin and Changchun experiencing much cooler weather compared to the high temperatures in southern cities like Nanning and Haikou [6]

Core Points - Southern China is experiencing the strongest period of rainfall, with heavy rain and severe storms expected in several provinces [1][2] - The central and northern regions are also forecasted to receive increased rainfall, with specific areas experiencing moderate to heavy rain [2][3] - A significant drop in temperatures is anticipated in the central and northern regions due to the arrival of cold air and precipitation, with temperature decreases of over 10°C in some areas [6] Summary by Sections Rainfall and Weather Conditions - Southern China has entered the strongest phase of a new round of heavy rainfall, affecting regions such as Anhui, Hubei, Hunan, Jiangxi, and parts of Guangxi [1][2] - The Central Meteorological Observatory predicts moderate to heavy rain in various regions, including the Yellow River basin and southern Jiangsu, with some areas experiencing heavy rain or severe storms [2][3] Temperature Changes - Following a period of high temperatures across northern and central China, a significant cooling trend is expected, with temperature drops of 10°C to 16°C in affected areas [6] - Specific cities like Xi'an and Zhengzhou are forecasted to see their maximum temperatures drop from over 37°C to around 27°C and 25°C, respectively [6] Future Weather Outlook - Rainfall intensity in southern China is expected to decrease in the coming days, with some regions still experiencing moderate to heavy rain [4] - The temperature in northern regions is projected to rise again after a brief cooling period, while southern areas will see slower temperature increases due to ongoing rainfall [6]

Summary of Key Points Core Viewpoint - The recent heavy rainfall in China's central and eastern regions has set new records for May, with significant impacts expected on agriculture and weather patterns in the coming days [1][12]. Weather Patterns - A large-scale rainfall event occurred over the past two days, breaking single-day precipitation records in 24 stations across Beijing, Hebei, and Shanxi [1]. - The current rainfall is expected to taper off, with most regions experiencing sunny weather for a couple of days before more rain returns [3][5]. - From May 13 to 14, light to moderate rain is forecasted for areas including North China and the eastern Huanghuai region, with potential for severe weather events such as thunderstorms and hail [8]. Agricultural Impact - The period from May 12 to 17 will see high temperatures exceeding 32°C in North China and surrounding areas, with risks of dry hot winds affecting winter wheat production [14][16]. - The dry hot wind conditions pose a significant risk to the critical growth phase of winter wheat, potentially impacting yield due to adverse effects on grain filling [16].