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There are heavy to heavy rains in parts of southeastern Guangxi, southwestern Guangxi, Hainan Island, northeastern Hubei, northern Anhui, northern Jiangsu, southern Shandong, eastern Liaoning, southeastern Jilin, northeastern Inner Mongolia, western and central Yunnan, and other places. Among them, there are heavy rainstorms in parts of southeastern Guangxi, northern Jiangsu, southern Shandong, and eastern Liaoning, and locally extremely heavy rains (250 to 260 mm) in southeastern Guangxi and other places. Some of the above-mentioned areas are accompanied by short-term heavy precipitation (maximum hourly rainfall of 20 to 50 mm, and locally it can exceed 80 mm), and there are local thunderstorms and strong winds and other strong convective weather. Some areas in central and western North China, southern Huanghuai, northern Jianghuai, and northern Southwest China will experience thunderstorms, strong winds or hail of level 8 or above, among which:
Some areas in northern Anhui and central and northern Jiangsu will have thunderstorm winds above level 10, with the maximum wind force reaching level 12 or above. The possibility of tornadoes cannot be ruled out locally;
Parts of northeastern China, north-central North China, Jianghuai, southern Huanghuai, eastern and southern Southwest China, and southern China will have short-term heavy precipitation weather with hourly rainfall greater than 20 mm. Among them, some areas in eastern Liaoning, eastern and southern Shandong, southern Henan, central and northern Anhui, northern Jiangsu, southeastern Guangxi, southwestern and central Guangxi have hourly rainfall greater than 50 mm, with a maximum of more than 80 mm.
Strong convective weather has entered a period of high incidence, with short-term heavy rainfall, thunderstorms and strong winds occurring frequently. Beijing has issued thunder and lightning warnings for five consecutive days, and tornadoes have also occurred in some areas of Hubei.
Why do strong convective weather occur frequently in the north and south? Meteorological analysts from the China Meteorological Administration explained that the south is mainly affected by the superimposed monsoon airflow of the "Mesak" remnant low vortex, with abundant water vapor and favorable conditions for the development of convection; the north is controlled by the cold vortex system, which continues to circle and transport cold air. Coupled with sufficient water vapor transport on the north side of the subtropical high, cold and warm air meet violently, making it easy to form mixed strong convection weather. Especially in the area at the bottom of the cold vortex, "local sudden convection" is prone to occur, often showing the phenomenon of "clear skies one moment and violent storms the next."
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