冷空气影响中东部，周末防范大风降温！

Group 1 - The core viewpoint of the articles highlights the impact of cold air on various regions in China, leading to significant temperature drops and snowfall in certain areas [1][3][6] - From December 19, regions such as Xinjiang, Gansu, Inner Mongolia, Heilongjiang, and Jilin experienced light to moderate snow, with some areas in Heilongjiang facing heavy snow [1] - A temperature drop of 4 to 8°C was observed in northern Xinjiang, central and western Gansu, Inner Mongolia, northern North China, and Northeast China, with some areas experiencing drops exceeding 10°C [1][3] Group 2 - The cold air is expected to affect eastern Inner Mongolia, Northeast China, central and southern North China, and parts of the Huanghuai and Jianghuai regions, with temperature decreases of 4 to 6°C, and localized drops of 8 to 10°C [3] - Wind speeds of 4 to 5 levels, with gusts reaching 6 to 8 levels, are expected in the affected areas, while eastern and southern sea areas may experience winds of 5 to 7 levels and gusts of 8 to 9 levels [5] - The Central Meteorological Observatory has issued a blue warning for strong winds, indicating the severity of the weather conditions [5] Group 3 - Despite the cold air influence, the overall temperature in most parts of the country has been significantly higher than the same period in previous years, indicating a warm pattern that is expected to persist until the end of the year [8] - Meteorological experts suggest that the current cold air process will primarily bring strong winds and temperature drops, with weaker rain and snow, although noticeable snowfall is expected in northern Xinjiang and western Hubei [9]