10月15日至19日，新一股冷空气自西向东影响中国，北方大部地区将迎来显著降温过程1。气象部门预测，局地降温幅度可达8℃以上1，到20日前后，西北、华北北部、东北地区多地最高气温将不足10℃1。呼和浩特、西宁、银川、乌鲁木齐等城市最低气温到19日前后将跌至冰点或以下1，北方大部地区气温刷新下半年新低1。
在这股冷空气影响期间，冷暖气流在北方交汇，将产生同期少见的强降雨过程1。此次强降雨的影响范围、累计降水量及单日降水强度均为罕见1，涉及新疆、青海、甘肃、陕西、河南、四川、山东、江苏、河北、辽宁等多个地区1。气象部门提示，这种极端天气可能带来交通安全隐患1。
A new cold air mass will sweep across China from west to east between October 15 and 19, bringing unusually severe weather to northern regions 1. The temperature drop will be particularly dramatic, with some areas experiencing declines exceeding 8°C, pushing maximum temperatures across the northwest, northern North China Plain, and northeastern regions below 10°C by October 20 1. Minimum temperatures in cities including Hohhot, Xining, Yinchuan, and Urumqi are expected to fall to freezing or below by around October 19 1.
The cold front will interact with warm air currents to produce exceptional precipitation across northern China 1. The affected areas—spanning Xinjiang, Qinghai, Gansu, Shaanxi, Henan, Sichuan, Shandong, Jiangsu, Hebei, and Liaoning—will experience rare heavy rainfall with unusually large impact scope, cumulative precipitation volumes, and single-day rainfall intensity 1. This severe weather pattern may pose potential hazards to transportation safety 1.
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