中央气象台：青藏高原东部雨雪增强，弱冷空气影响北方地区

Group 1 - The central meteorological station reported snowfall and sleet in various regions including eastern Tibet, western Sichuan Plateau, southern Qinghai, northeastern Inner Mongolia, Heilongjiang, and western Xinjiang on October 30 [1] - From October 30 to 31, rain and snow are expected to intensify in the southern and eastern parts of the Tibetan Plateau, with moderate to heavy snow or sleet in southern and central eastern Tibet, southern Qinghai, and northern western Sichuan Plateau, with localized heavy or blizzard conditions [1] - A strong cold air mass is anticipated to affect most parts of China around November 7, leading to a temperature drop of 4 to 8 degrees Celsius in most areas north of the Yangtze River, with localized drops exceeding 10 degrees Celsius [3] Group 2 - Over the next three days, weak cold air will cause temperature drops of 2 to 4 degrees Celsius in regions such as Inner Mongolia, southern Northeast China, northern Shaanxi, and northern North China, with localized drops around 6 degrees Celsius [4] - Areas including eastern Inner Mongolia, most of Heilongjiang, and Jilin will experience light to moderate snow or sleet, with heavy snow in parts of western and southern Heilongjiang and eastern Jilin [4] - Experts warn of continuous rain and snow in eastern Tibet, with expected new snow accumulation of 2 to 6 centimeters, and localized depths reaching 8 to 15 centimeters, advising the public to clear snow from roofs to prevent collapses [5]