It snows in April. What happened?

The temperature has just shown signs of warming up, and it snowed in the central and southern regions yesterday. In this regard, meteorologists explained that this newspaper reported on April 14 (Reporter Li Li) that it rained and snowed in Qi Fei in the early morning, which continued to lower the temperature. Is it abnormal to snow in April? Provincial meteorologists explained that every year in our province 10 to April of the following year is a meteorological winter half year, during which snowfall is a normal weather phenomenon. According to the latest rain monitoring, the rain and snow started at two o'clock this morning. Except in the north, there are different degrees of sleet or light snow in the central and southern parts of our province. The precipitation in Jishan is the largest in the whole province, which is 8.2 mm, and that in Qingxu, Taiyuan is the largest, which is 2.7 mm. 10 in the morning, and the precipitation is over. The temperature has just warmed up. At this time in previous years, spring clothes have long been put on. Why is it snowing again? Many people find it strange. Provincial meteorologists explained that snowfall began to appear in our province as soon as it entered 10 every year, and this snowfall period will last until April of the following year, which is called winter half year in meteorology. Snowfall is normal in this period. For example, on April 1 1 day, 2006, there was a heavy snowfall, and the northern part of our province recorded snowfall in early May. Cold air intrusion. 13 in the morning, the lowest ground temperature in the north, middle, Linfen, Changzhi, Yuncheng and most counties and cities of Jincheng has dropped to 0℃. After rain and snow, the temperature is still low. In the morning of 15, the lowest ground temperature in the above areas is still below 0℃, which has a great impact on agricultural production. It is predicted that during the daytime on 15, the weather will return to fine, the temperature will start to rise, and the maximum temperature will climb from 16 to about 20℃.