Why is there a tornado in Jianli, Hubei? Why is there a tornado on the Yangtze River?

According to CCTV news, in June 1 day and night, a passenger ship with more than 400 people capsized in the Hubei section of the Yangtze River. The accident site is near Jianli City. According to the analysis of meteorological radar monitoring data, the cause of the capsizing is tornado, and the wind force is above 12.

China Weather Network once published an article saying that "the horizontal range of tornadoes is very small, ranging from several meters to several hundred meters in diameter, with an average of about 250 meters. Its wind power can reach more than 12, and the tornado lasts only a few minutes, but the longest is not more than a few minutes, but the disaster caused is very serious. " In terms of time, it is mostly in late spring and early summer.

Jianli, where the tornado happened this time, is located in the hinterland of the middle and lower reaches of the Yangtze River, near Dongting Lake, Honghu Lake, Changhu Lake and other plain lakes. In summer, high temperature makes the lake water evaporate, forming a strong airflow, which is quite different from the surrounding atmosphere, thus forming strong convection and thunderstorm clouds. Tornadoes mainly occur in open and flat places. In this terrain, it is easy to form a cyclone and then a tornado when encountering strong convective weather or high temperature weather.

In fact, tornadoes are very common in summer in Hubei. 20 12 On June 22nd, Changling Village, Dahong Village and Mao Tan Village of Dakou Forest Farm in Zhongxiang City, Hubei Province were hit by tornadoes. 20 13 On August 3rd, Caidian, Wuhan was hit by a tornado. The local media said, "In less than 10 minutes, the roaring strong wind swept away the tiles on the roof, broke the big tree with thick waist and blew pedestrians out for more than ten meters." On August 3rd, 2065438, a tornado occurred in Xiangyang Village, Xiaowu Township, Xiaochang County. "This sudden storm not only uprooted or broke trees, but also blew off five low-voltage poles in the village."