"炙烤模式"还要延续一日，今天上海最高气温可达35℃。高温日数量将排在上海自1873年有气象记 录以来的历史第二位。 今天下午，上海受冷暖空气共同影响，将有一次较为明显的降水过程，局部地区雨量可达大雨到暴 雨。雨水打压下，周四最高气温将降至29℃。 记者 戚颖璞 上海又热出新纪录。昨天，上海中心城区最高气温36.4℃，是今年的第52个高温日。至此，今年的 高温日数量追平2024年。 从目前预报来看，受活跃的海上对流活动影响，本周中后期上海将主要被偏东气流掌控，多阵雨天 气，气温稳定在25℃至31℃。 ...

Group 1 - The article highlights the extreme heat in Hangzhou, with temperatures reaching 36.0℃ on September 15, marking the 60th high-temperature day of the year, and a record for September with 11 high-temperature days [1][2] - The article indicates that the high-temperature days may continue to rise, potentially breaking the historical record of 61 days set in 2024, depending on the arrival of rain [1][2] - The meteorological analysis suggests that a cold air mass may enter Hangzhou, leading to significant rainfall and a drop in temperatures by nearly 10℃ starting Thursday, with no high temperatures expected until at least September 25 [2] Group 2 - The timing of the rain is crucial for determining whether the high-temperature record will be broken, with specific conditions outlined for when rain could prevent temperatures from exceeding 35℃ [2] - Following the arrival of rain, a significant decrease in temperature is expected, with a shift in weather patterns leading to increased rainfall across the province [2] - The article also mentions the potential for typhoons to develop in late September, which could contribute to cooler weather conditions [2]

Group 1 - The weather in Hangzhou has experienced a significant temperature drop from 39.4°C on September 8 to a maximum of 30.7°C recently, attributed to the influence of cold air and moisture from the southwest [1][2] - Rainfall is expected to be frequent across the province until next Friday (19th), with specific weather patterns indicating systematic rain or thunderstorms from the 16th to 17th [1][2] - The overall high-temperature weather is coming to an end, with the southern regions potentially experiencing isolated high temperatures before a more stable cooler weather pattern sets in [2] Group 2 - Nationwide, rain and cooling trends are dominating the weather scene, with the weakening of the subtropical high pressure contributing to the drop in high temperatures [2] - A new round of strong rainfall is anticipated in northern regions, particularly in Henan and Shandong, which may experience rare heavy rain during this period [2] - The competition between the "autumn tiger" (late summer heat) and cold air is ongoing, with expectations of a noticeable cold air mass moving southward from the 15th to 17th [2]

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]

Summary of Key Points - The first large-scale high-temperature weather in China is expected to peak on May 19-20, with temperatures reaching 37°C to 39°C in many areas [1] - Some regions in Hebei, Henan, and Shaanxi may experience extreme heat exceeding 40°C, prompting public health advisories for heat prevention [1] - Meanwhile, southern regions will continue to experience widespread rainfall, with a new round of precipitation expected to seamlessly follow, raising concerns about secondary disaster risks from overlapping rainfall [1]