来源：中央气象台 华北中南部黄淮中西部等地大气扩散条件转差 长三角区域 26日至28日白天，华北中南部、黄淮中西部等地大气扩散条件有所转差，部分地区有轻至中度霾。28日夜间起，受冷 空气影响，上述地区霾天气逐步减弱或消散。 具体预报如下： 京津冀及周边区域 26日至28日白天，区域中南部大气扩散条件有所转差，部分地区有轻至中度霾。28日夜间起，受冷空气影响，区域霾 天气逐步减弱消散。 25日夜间至26日，区域大气扩散条件较好，无明显霾天气。27日至29日，区域北部大气扩散条件一般，部分地区有轻 度霾。 汾渭平原 26日至27日，区域中南部大气扩散条件逐渐转差，部分地区有轻度霾。28日白天起，受冷空气影响，区域霾天气逐步 减弱消散。 华中区域 25日夜间至26日，区域大气扩散条件较好，无明显霾天气。27日至29日，区域大气扩散条件一般，部分地区有轻度 霾。 珠三角区域 未来一周，区域大部大气扩散条件较好，无明显霾天气。 未来一周，区域大部大气扩散条件较好，但在冷空气间歇期，辽宁中部、黑龙江中南部等地的部分地区有轻度霾。 西北区域 未来一周，区域大部大气扩散条件较好，但新疆天山北坡部分地区有轻至中度霾，新疆南疆盆 ...

Summary of Key Points Core Viewpoint - The upcoming three days (October 29 to 31) will see frequent rain and snow in parts of the Tibetan Plateau, while precipitation will increase in the central and eastern regions of China, necessitating public attention to travel safety during inclement weather [1][2][7]. Weather Conditions - Significant snowfall was reported in parts of the Tibetan Plateau, with light to moderate snow or sleet observed in regions such as eastern Tibet and northern Sichuan Plateau [2][4]. - The Central Meteorological Observatory forecasts continued widespread rain and snow in the Tibetan Plateau, with central and eastern China experiencing increased precipitation, primarily light to moderate rain [2][6]. Temperature Changes - Southern regions will experience a slight drop in temperatures due to increased rainfall, with maximum temperatures in cities like Guiyang and Changsha expected to decrease significantly [5][8]. - A cold air mass is anticipated to impact central and eastern China later this week, leading to temperature drops of 4 to 6 degrees Celsius, with some areas experiencing drops exceeding 8 degrees Celsius [5][8]. Public Advisory - Meteorological authorities have advised the public to take precautions against cold weather and to be aware of the potential impacts of snow on transportation and agriculture [7].

Weather Alerts - The Central Meteorological Observatory issued a blue rainstorm warning, predicting heavy rain in regions including southern Shaanxi, northeastern Sichuan, and most of Chongqing from October 12, 08:00 to October 13, 08:00, with local areas experiencing extreme rainfall of 100-120 mm [3][5] - The warning includes potential short-term heavy rainfall with maximum hourly precipitation of 20-30 mm, and localized areas may exceed 50 mm, along with thunderstorms and strong winds [3][5] Typhoon Update - Typhoon "Nakiri," the 23rd typhoon of the year, has intensified from a tropical storm to a strong tropical storm as of October 11, with maximum wind speeds of 28 m/s and a minimum central pressure of 982 hPa [7][8] - The typhoon is expected to move northeast at a speed of 25-30 km/h, gradually weakening and transitioning into a temperate cyclone by October 14 [8] Air Quality and Meteorological Conditions - Most regions in the country are experiencing favorable atmospheric diffusion conditions, with no significant haze expected; however, from October 13 to 16, some areas in central and southern regions may experience short-term haze [11][12] - Specific regions such as the Yangtze River Delta and the Fenwei Plain are forecasted to have good atmospheric conditions with no significant haze [13][14] - The central and southwestern parts of Hunan may see light to moderate haze on October 12, but conditions are expected to improve later [15]