转自：四川在线 四川省气候中心提醒，预计2月全省除盆北外的其余大部地区降水仍然偏少，相关农区应密切关注后期季节性冬干发展趋势，做好农田抗旱保墒工作和小春 病虫害监测防治。同时，虽然上旬盆地有两次降水过程但降水空间分布不均，部分地区可能出现土壤偏湿，应及时清沟排湿降渍，防止田间积水。 另一个需要重点关注的是防火。预计2月，阿坝州、甘孜州、攀西地区森林草原火险气象等级为3级，在连晴多风时段森林草原火险气象等级可达2级。甘孜 州北部、阿坝州北部、攀西地区和盆地西部部分地区有中等以上气象干旱发生。对此，气象专家指出，2月川西高原、攀西地区森林草原火险等级较高，加 之春节人员活动增加，人为火灾隐患突出，建议加强火险监测预警，火源管理和林区巡查，及时清理林下可燃物，做好应急准备工作。 此外，四川省气候中心预计，2月上旬前期、中旬前期以及下旬，盆地大部静稳天气发生概率较高，不利于污染物的扩散，易发生雾、霾过程。冬季盆地多 大雾天气，盆周山区及高原山地易发生雨雪天气和道路结冰灾害，各地须加强监测预警，防范大雾和雨雪天气对交通运输带来的不利影响。 预计2月，全省平均降水量为10.5~12.5毫米，较常年同期（13.4毫米）偏少 ...

Group 1 - The core viewpoint of the article highlights the upcoming weather changes, including a significant temperature drop and the arrival of cold air masses affecting the region [3][4][6] - The first cold air mass is expected to arrive from the night of December 28 to December 30, primarily causing a drop in temperature [3][6] - The second cold air mass will begin affecting the area on December 31, bringing strong winds and continued low temperatures into the new year [4][6] Group 2 - The forecast indicates that the highest temperatures will decrease by 6 to 8 degrees Celsius by December 31, with the lowest temperatures expected to reach around -6 degrees Celsius by January 3 [6] - Visibility issues due to fog and potential road hazards from rain and snow are anticipated, urging the public to take precautions [8] - The weather forecast for the next three days includes mostly sunny to partly cloudy conditions, with specific mentions of fog in the eastern and southwestern regions [8][10][11][12][13]

Group 1 - Southern regions of China experienced heavy fog this morning, with visibility in some areas dropping below 50 meters, such as 32 meters in Youxi and 49 meters at Jiuxianshan [1][3] - Air quality issues were reported, with severe pollution in Fuyang, Anhui, and haze conditions in parts of Anhui, Zhejiang, and Hunan [3] - A cold wave is expected to bring strong winds, temperature drops of 6 to 10 degrees Celsius, and localized drops of around 16 degrees Celsius, starting from Xinjiang and moving eastward across the country [3][5] Group 2 - From December 11 to 13, widespread rain and snow are forecasted across central and eastern China, with regions like the Sichuan Basin and southern Jianghan expected to receive light to moderate rain, and parts of Xinjiang and the northeast experiencing light snow or sleet [5] - The cold air mass will improve atmospheric dispersion conditions in North China and the Huanghuai region after December 12, alleviating haze issues [3][5]

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].