北方“专属”冷空气让气温再探底 下周气温20℃线将重回黄河流域

Group 1 - A new cold air mass has arrived, primarily affecting northern regions of China, while southern areas remain warm with temperatures reaching around 30°C in places like Guangdong and Hainan [1][3] - Northern cities such as Changchun and Shenyang are expected to experience their lowest temperatures of the year, with highs of 4°C and 8°C respectively [3] - The overall trend for the coming days indicates a gradual warming in the central and eastern regions of China, with temperatures expected to return to normal or slightly above normal levels after October 28 [3] Group 2 - Fog and haze are anticipated in northern regions during the intervals between cold air impacts, particularly affecting areas like southern Hebei and most of Shandong [5] - Historically, from September to February, northern China experiences a significant number of foggy days, with cities like Shijiazhuang and Tianjin seeing over 80% of their annual fog days during autumn and winter [5] - Snowfall is expected in northeastern Inner Mongolia and northern Heilongjiang due to the new cold air, with localized heavy snow possible [6] Group 3 - The southwestern region of China is forecasted to have frequent rainfall in the last days of October, particularly in areas like Sichuan and Yunnan, with precipitation expected over 4 to 7 days [6]