The Beijing Meteorological Bureau issued an advisory around 7:20 AM, forecasting significant rainfall over the next hour in central urban areas and districts including Daxing, Tongzhou, Shunyi, Miyun, Pinggu, and southern Huairou. Localized heavy downpours with high intensity may adversely affect the morning peak commute, urging residents to enhance precautions.

From midday through the night on August 11, the city experienced scattered thunderstorms, with notably heavier precipitation in districts such as Miyun, Shunyi, Tongzhou, Chaoyang, and Yanqing. Between 12:00 PM on August 11 and 7:00 AM on August 12, the average citywide rainfall measured 19.7mm, while the average in urban areas was 16.5mm. Among the city's meteorological stations, 130 recorded rainfall exceeding 50mm, accounting for 13% of the total. The highest accumulation was observed at Mujiayu in Miyun District, reaching 195.6mm.

Between 4:00 AM and 5:00 AM, the peak hourly rainfall intensity was recorded at Beiliugezhuang in Tongzhou District, with 53.6mm. From 5:00 AM to 6:00 AM, the highest hourly amount shifted to Liujiadian in Pinggu District, hitting 72.3mm. Subsequently, between 6:00 AM and 7:00 AM, the maximum hourly rainfall was measured at Yufa in Daxing, at 65.8mm.

For context, the national standard GB/T 28592-2012 "Precipitation Grade" defines heavy rain as 50 to 99.9mm within 24 hours, torrential rain as 100 to 249.9mm, and extreme torrential rain as 250mm or more.