大反转！猛降17℃！河南大范围雨雪沙尘要来了

Core Viewpoint - A significant temperature fluctuation is expected in Henan, with a major warming trend followed by a strong cold front bringing rain and snow [1][6]. Group 1: Temperature Changes - A large-scale warming is anticipated across most regions of China, with temperatures rising by 15 to 20 degrees Celsius in areas from Huanghuai to the Yangtze River [1]. - On February 21, temperatures in northern and southwestern parts of Henan may reach around 26 degrees Celsius, while other areas will range from 22 to 24 degrees Celsius [1]. - The highest temperature on February 21 will contrast sharply with the lowest temperature on February 23, which is expected to drop to 9 degrees Celsius, marking a 17-degree difference [8]. Group 2: Weather Conditions - Strong winds are expected from February 19 to 20, with gusts reaching 6 to 7 levels, increasing the risk of forest fires due to dry conditions [4]. - A cold front will begin affecting Henan on the night of February 21, bringing strong winds, temperature drops, and potential sandstorms or dust [6]. - Rain and mixed precipitation are forecasted for February 22 to 23 and again from February 25 to 26, coinciding with the peak travel period for the Spring Festival [10]. Group 3: Daily Weather Forecast - February 19: Sunny with temperatures ranging from 4 to 19 degrees Celsius [11]. - February 20: Partly cloudy with temperatures from 6 to 24 degrees Celsius [11]. - February 21: Partly cloudy with a high of 26 degrees Celsius [11]. - February 22: Cloudy with temperatures dropping to a high of 16 degrees Celsius [11]. - February 23: Overcast with light rain or mixed precipitation, temperatures between 5 and 10 degrees Celsius [11]. - February 24: Partly cloudy with temperatures from 0 to 10 degrees Celsius [11]. - February 25: Partly cloudy with temperatures from 2 to 12 degrees Celsius [11].