Why is there hail in Zhoukou?

Yesterday afternoon 16: 40, Zhoukou city was hit by heavy rain, which led to the uprooting of more than a thousand trees in urban sections, some of which were one meter in diameter. According to the personnel of the local meteorological department, there are strong winds, thunderstorms and hail weather in some counties and cities of this city. The maximum instantaneous wind speed is 27. 1 m/s, reaching 10, the maximum hail diameter is 10 mm, and the precipitation is about10 mm. Hail occurred in Zhoukou, Henan Province on June 3. Xinhua News Agency More than 1,000 trees in the urban area have been uprooted due to violent storms, some of which are up to one meter in diameter. Atlas of rainstorms in various places > > CCTV International reported on June 4th that on June 3rd 16: 45, a rainstorm with hail suddenly hit Zhoukou, Henan. According to the personnel of the local meteorological department, there are strong winds, thunderstorms and hail weather in some counties and cities of this city. The maximum instantaneous wind speed is 27. 1 m/s, reaching 10, the maximum hail diameter is 10 mm, and the precipitation is about10 mm. More than 1000 trees in the urban section 1000 are uprooted due to heavy rain, and some of them have a diameter of one meter. Billboards, street lamps, electricity and other facilities on the street were damaged to varying degrees. Nearly 100 citizens were injured by trees, glass, billboards and other items to varying degrees, and their travel and life were affected. (This article Source: CCTV International)

The above is what I saw on the Internet after lunch today. Zhoukou's hometown called home to ask about peace (need to use a mobile phone, because the power went out yesterday). I am from Huaiyang County, and all the trees in my house were blown down by the wind and smashed on the house. Some children were hit on the head while playing outside.