四预警齐发！局地降温可达16℃以上

Core Viewpoint - A significant weather change is expected in China, with a drop in temperatures and adverse weather conditions affecting travel during the Spring Festival return period [1][10]. Weather Forecast - From February 21 to 22, temperatures in northern China will drop by 6 to 10 degrees Celsius, with some areas experiencing a decrease of 12 to 16 degrees Celsius, and localized drops exceeding 16 degrees Celsius [3][5]. - The Central Meteorological Observatory has issued multiple weather warnings, including yellow alerts for strong winds and sandstorms, blue alerts for snowstorms, and blue alerts for cold waves [2][10]. Precipitation and Snowfall - Significant snowfall is expected in Inner Mongolia and northeastern regions, with some areas anticipating an additional 10 to 20 centimeters of snow [7]. - Starting tomorrow, widespread rainfall will occur in the Huanghuai region and southward, with some areas experiencing severe convective weather [6][9]. Impact on Travel - The weather changes, particularly the cold wave and strong winds, will significantly impact travel and return journeys during the Spring Festival, especially in northern regions [10][12]. - The strongest wind effects are expected today, with gusts reaching 9 to 11 levels, and the most severe sandstorm conditions will also occur today, particularly in western Inner Mongolia and Gansu [10].