Summary of Key Points Core Viewpoint - Beijing has issued a yellow alert for thunderstorms, predicting significant rainfall and strong winds in most areas from the afternoon of August 15 to the morning of August 16 [1][3]. Weather Alerts - A yellow thunderstorm warning has been issued for Beijing, indicating expected thunderstorms with localized heavy rain and short-term winds of around 7 levels [3]. - The Beijing Water Authority and Meteorological Bureau have jointly issued a blue alert for mountain flood disasters, predicting a high likelihood of such disasters in the Miyun and Huairou districts starting at noon today [3]. Weather Conditions - The weather forecast for today includes cloudy conditions turning to overcast with scattered thunderstorms, with a maximum temperature of 30°C and winds from the north to south at levels 2 to 4 [3]. - Thunderstorms are expected from noon to night, with localized heavy rainfall and short-term winds of around 7 levels, with some areas potentially experiencing torrential rain [3].

Core Points - Beijing is experiencing significant rainfall, with an average precipitation of 5.5 mm across the city and a maximum of 27.7 mm recorded in Fengtai District [2] - Multiple weather warnings have been issued, including blue alerts for thunderstorms, heavy rain, and mountain flood risks [9][11][13] Group 1: Weather Conditions - The Beijing Meteorological Station has forecasted afternoon rain with localized heavy downpours and thunderstorms, with temperatures ranging from a high of 24°C to a low of 19°C [1] - As of 9 AM, the average rainfall in urban areas reached 9.6 mm, indicating a widespread impact of the weather [2] Group 2: Warnings and Alerts - A blue alert for flooding has been issued, particularly in Chaoyang, Haidian, and Fengtai districts, where localized flooding risks are present [6] - A blue alert for mountain flood disasters has been announced, warning residents to avoid mountain areas and water bodies due to potential hazards [9] - The city has activated a Level IV emergency response for flood control, with measures to enhance drainage and monitoring of water levels [8]