Core Viewpoint - The Three Gorges Reservoir experienced its largest flood event of 2025 on September 20, influenced by autumn rains in Southwest China, following a period of significantly reduced water inflow during the main flood season [1] Group 1: Water Inflow and Flood Events - The inflow to the Three Gorges Reservoir began to rise gradually from September 17, culminating in a flood with inflow exceeding 40,000 cubic meters per second on September 20 [1] - During July and August, the total water inflow to the Three Gorges Reservoir was more than 20% lower than the average inflow for the same period since the reservoir's establishment [1] - The recent rainfall events in the upper reaches of the Yangtze River, particularly in the Jialing River and the Three Gorges area, contributed to the increase in inflow [1]

根据《国家防汛抗旱应急预案》有关规定，国家防总决定于17日针对重庆、陕西启动防汛四级应急响应。中国气象局17日也启动气象灾害 三级应急响应。 受降雨影响，长江上游干流及支流岷江、沱江、嘉陵江、汉江上游等主要河流将出现明显涨水过程，暴雨区内部分中小河流可能发生超警 以上洪水。17日，水利部组织防汛会商，分析研判雨情水情汛情态势，针对性部署防御工作，强化巡查防守和科学调度，加强河道堤防巡查防 守。 国家防总：针对重庆 陕西启动防汛四级应急响应 甘肃：降雨引发泥石流 局地出现冰雹 从16日开始，甘肃张掖以东的大部地区出现降水。其中，甘南藏族自治州北部出现暴雨。甘南州卓尼县城出现冰雹天气，冰雹的最大直径 为6毫米。短时强降雨和冰雹在卓尼县城形成积雹，深度20厘米。受降雨天气影响，卓尼县境内的国省干线公路多处发生泥石流，影响车辆正 常通行。当地公路部门组织人员和机械清理路面。 央视网消息：水利部预报显示：未来两天，重庆西部北部、四川东部南部、陕西南部等地将有大到暴雨、局地大暴雨，并有短时强降雨。 陕西汉中：强降雨致道路中断 转移人员迅速抢修 在陕西汉中硖口驿镇，强降水导致部分道路中断，当地迅速组织人员、机械对受损路段进 ...

Core Insights - The article discusses the onset of the "Huaxi Autumn Rain" in Shaanxi, which began on August 25, 2025, marking an early start to the autumn rain season by 8 days compared to the average [1] - The article highlights the importance of accurate precipitation forecasts provided by Moji Weather to help users adapt to weather changes and enhance their daily lives [1][2] Weather Phenomenon and Impact - Huaxi Autumn Rain is a unique weather phenomenon affecting regions such as Gansu, Shaanxi, and Sichuan, with specific criteria for determining its onset based on rainfall measurements [2] - Continuous rainfall from this phenomenon can alleviate drought conditions and improve soil moisture for winter wheat sowing, but it may also lead to spoilage of mature autumn crops [2] - The article emphasizes the need for precise precipitation forecasts during this period to mitigate risks such as landslides and urban flooding [2][7] Moji Weather's Services - Moji Weather offers a short-term radar precipitation map that provides a 56-hour global high-definition precipitation cloud map, allowing users to view rainfall trends and plan accordingly [2][4] - The "Heavy Rain Point Report" feature provides hourly precipitation forecasts based on user-selected locations, enhancing the service's ability to predict high-risk rainfall periods [4][5] - For agricultural users, Moji Weather assists in optimizing harvest and sowing schedules, while urban management can utilize forecasts to identify drainage issues [7] Technological Innovations - The "AI Life Index" feature focuses on outdoor activities and daily tasks, providing intelligent, hourly suitability ratings and behavior suggestions based on high-precision meteorological data [8] - This system employs a feedback loop mechanism to continuously refine its algorithms, ensuring that user needs are accurately captured and addressed [8] Broader Implications - The article notes that with increasing extreme weather events due to climate change, transforming professional meteorological data into understandable and actionable decision-making tools is becoming essential [10] - Moji Weather aims to empower users to transition from passive responses to proactive weather anticipation, thereby reducing decision-making uncertainties related to weather [10]

Group 1 - The 16th typhoon "Tabha" has formed and is expected to make landfall in Guangdong, bringing strong winds and heavy rain [2][4] - The typhoon is moving at a speed of approximately 20 kilometers per hour and is expected to strengthen before making landfall [2][4] - Rainfall in southern China, particularly in southwestern Guangdong and southern Guangxi, is expected to be significant, with some areas experiencing extreme rainfall [4][6] Group 2 - The transition to autumn is marked by the "White Dew" solar term, indicating a cooling trend in northern China, although the onset of autumn is slightly delayed compared to previous years [10][14] - High temperatures in southern China are finally easing, with regions like Zhejiang and Jiangxi still experiencing heat, but a significant drop in temperatures is anticipated after September 11 [10][12] - The northern regions are experiencing a notable drop in temperatures, with cities like Harbin and Changchun seeing lows around 10°C and 15°C respectively [14]

Group 1 - The core viewpoint of the articles highlights the unprecedented rainfall and extended rainy season in North China, marking it as the strongest since 1961 [2][6][13] - The North China rainy season began on July 5, 2023, which is 13 days earlier than the average, and lasted for 59 days, significantly longer than the typical 30 days [6][13] - The cumulative rainfall in North China has been exceptionally high, with some areas experiencing rainfall amounts 50% to 200% above the historical average [8][10] Group 2 - The rainfall has led to significant hydrological impacts, with 23 rivers exceeding warning levels, prompting a level IV flood defense response in Sichuan and Shaanxi provinces [1] - The rainfall has caused secondary disasters such as mountain floods and urban waterlogging, while also alleviating drought conditions in some regions [8][10] - The meteorological conditions contributing to this unusual weather pattern include abnormal sea surface temperatures in the equatorial Pacific and strong subtropical high pressure in the western Pacific [15]

后天，黄淮西部、江淮中北部、华南中南部等地部分地区有大到暴雨，其中，广西东南部、广东西南部 等地部分地区有大暴雨，局地特大暴雨。 央视网消息：据中国天气网消息，今天（9月6日）随着冷空气东移南下，北方降雨将结束，四川、陕西 等地部分地区仍有明显降雨。明后天，新一轮降雨又将无缝衔接，雨区大致位于四川盆地到黄淮一带。 同时，冷空气也将使得南方的高温天气收敛，北方早晚时段凉意加重，多地最低气温将创今年立秋以来 新低。 新一轮降雨将无缝衔接 四川陕西等地雨日较多 在冷空气和西南暖湿气流的共同影响下，昨天我国出现了大范围降雨。实况监测显示，陕西中南部、湖 北西部、四川盆地、贵州西部、云南东北部、山东中南部和半岛地区、江苏北部、安徽北部和东南部、 湖南北部、江西西南部、海南岛南部等地部分地区出现大到暴雨，四川东北部、重庆西南部、湖北西南 部等局地出现大暴雨，四川巴中局地特大暴雨。 今天，这轮降雨将进入收尾阶段，但陕西南部、四川东部、重庆中东部等地仍有强降雨。预计，陕西南 部、湖北西部、四川盆地东北部、重庆中东部、贵州中西部、云南北部、黑龙江东北部、山东东部、安 徽中部、江苏北部、江西西北部、湖南中部、广东东南部沿海、海南 ...

Summary of Key Points Core Viewpoint - The article discusses the impact of weather changes across various regions in China, highlighting significant rainfall in the northwest and central areas, while the southern regions continue to experience high temperatures and humidity. Group 1: Rainfall and Weather Patterns - Significant rainfall is expected in southeastern Gansu, Sichuan, Shaanxi, Shanxi, Hubei, and other areas due to the convergence of cold and warm air masses, with some regions experiencing heavy to torrential rain [1][2] - The Central Meteorological Observatory predicts that areas such as eastern Inner Mongolia, western Huanghuai, and parts of the Sichuan Basin will see moderate to heavy rain, with some areas facing heavy rain or torrential rain [2][4] - The rainfall is expected to continue, with warnings for potential secondary disasters such as mountain floods and geological hazards in regions like southern Shaanxi and eastern Sichuan due to the increased frequency of rain [4] Group 2: Temperature Variations - The southern regions are experiencing a significant expansion of high temperatures, with areas like Chongqing, Hubei, and Zhejiang recording temperatures above 35°C [5] - The article notes that the high-temperature conditions will persist, with the maximum range expected to be the largest in recent times, affecting areas from southern Henan to Guangxi and Guangdong [5] - In contrast, northern regions are experiencing a drop in temperatures due to cold air and rainfall, with maximum temperatures in places like Beijing and Shijiazhuang expected to fall below 25°C, marking a significant cooling trend [5]

央视网消息：据中国天气网消息，2025年华西秋雨于8月25日开始，较常年偏早8天。中央气象台预计， 未来十天华西地区雨日增多，陕甘川交界一带雨日多、累计雨量较大，需注意防范次生灾害。 华西秋雨监测站点空间分布图（红点代表北区，蓝点代表南区） 同时，据中央气象台，未来十天（9月3日至12日）陕甘川交界一带雨日多、累计雨量较大。3日至6日， 西北地区东部、四川盆地、华北南部、东北地区南部及黄淮等地自西向东有一次中到大雨过程，陕西南 部、甘肃南部、山西南部及四川北部等地局部有暴雨。8至9日及10至12日，主雨区在陕西南部、四川东 部、江汉、江淮及江南北部，上述地区有中到大雨，部分地区暴雨。 华西秋雨是我国华西地区秋季（9至11月）特有的天气现象。秋季，频繁南下的冷空气与暖湿空气在该 地区相遇，使锋面活动加剧而产生较长时间的阴雨天气。华西秋雨的降水量一般少于夏季，但持续降雨 或强降雨也易引发秋汛。华西秋雨主要涉及的行政区域包括湖北、湖南、重庆、四川、贵州、陕西、宁 夏、甘肃共6省1直辖市1自治区。 来自国家气候中心的消息，根据气象行业标准《中国雨季监测指标 华西秋雨》（QX/T 496-2019），今 年华西秋雨北区 ...