北方有大风降温沙尘天气，内蒙古东北部黑龙江等地有较强降雪

Group 1 - Strong winds and temperature drops are expected in northern regions, including Inner Mongolia, Northeast China, North China, and parts of the Huanghuai and northern Ningxia, with wind speeds reaching 5-7 levels and gusts up to 11 levels [1] - A temperature drop of 6-10°C is forecasted, with some areas in Inner Mongolia and Heilongjiang experiencing drops of 12-14°C, and localized drops exceeding 14°C [1] - Dust storms are anticipated in the Jianghuai region and northward, with some areas in western Inner Mongolia facing sandstorms and localized severe sandstorms [1] Group 2 - Heavy snowfall is expected in northeastern Inner Mongolia, western Heilongjiang, western Jilin, and parts of northern Xinjiang, with localized areas in western Heilongjiang receiving 20-25 mm of snow [2] - New snow accumulation of 6-12 cm is forecasted, with some areas exceeding 18 cm [2] - From February 22 to 24, light to moderate rain is expected in southern Huanghuai, Jianghuai, Jianghan, Jiangnan, and eastern Southwest China, with localized heavy rain and severe convective weather in parts of Jiangnan and eastern Guizhou [2]