Core Insights - Shandong province is experiencing unprecedented rainfall this October, breaking multiple historical records for precipitation levels [1][2][3] Summary by Sections Rainfall Records - From September 1 to October 8, the average rainfall in Shandong reached 249.1 mm, which is 270.7% higher than the normal 67.2 mm, marking the highest level since 1951 [1][3] - During October 1 to 8, the average rainfall was 78.6 mm, significantly exceeding the normal 8.7 mm by 803.4%, ranking as the second highest since 1951 [2][3] City-Specific Data - Four cities, including Weifang, Zibo, Qingdao, and Rizhao, recorded rainfall amounts exceeding ten times their normal levels [2] - Sixteen cities have reported historical rainfall levels, with five cities breaking records for the highest rainfall during this period [3] Meteorological Analysis - The unusual continuous rainfall is attributed to an exceptionally strong subtropical high pressure, which differs fundamentally from the typical Mei Yu (plum rain) season [4][5] - The current weather pattern is characterized by stable, gentle rainfall due to the interaction of cold fronts and warm air masses, leading to a prolonged rainy period [4][5] Future Weather Predictions - The average rainfall for October is expected to be between 120.0 to 150.0 mm, which is 3 to 4 times higher than the normal 30.1 mm [5] - After October 13, the likelihood of similar prolonged rainfall events is low, with a brief return to sunny weather expected [5]

Core Viewpoint - The recent continuous rainfall in Shandong province has broken historical records, with significant increases in precipitation levels compared to the average for this time of year, raising concerns and interest in the region's climate patterns [1][2][3]. Summary by Sections Precipitation Records - From September 1 to October 8, the average precipitation in Shandong reached 249.1 mm, which is 270.7% higher than the normal 67.2 mm, marking the highest value since 1951 [1][3]. - During October 1 to 8, the average precipitation was 78.6 mm, a staggering 803.4% increase from the typical 8.7 mm, making it the second highest since 1951 [2][3]. Regional Rainfall Variations - Four cities, including Weifang and Zibo, recorded rainfall exceeding ten times the normal levels for this period, while eleven cities, including Dezhou and Jinan, saw increases of 5 to 9 times [2][3]. - The rainfall data indicates that Qingdao, Linyi, Jining, Heze, and Zaozhuang set new historical records for precipitation during this time [3]. Climate Analysis - The unusual persistent rainfall is attributed to an exceptionally strong subtropical high pressure, which differs fundamentally from the typical Mei Yu (plum rain) season that occurs in summer [4]. - The current weather pattern is influenced by a broad low trough over the Eurasian continent, facilitating the southward movement of cold air and resulting in increased precipitation in Shandong [4][5]. Future Weather Predictions - It is anticipated that the average precipitation for October will range between 120.0 to 150.0 mm, which is 3 to 4 times higher than the normal 30.1 mm [5]. - After the rainfall ends on October 13, the likelihood of similar persistent rain events occurring again is low, with a brief return to sunny weather expected before another short-lived rain event around October 17 [5].