According to the Shandong Meteorological Observatory, affected by the upper trough, it is expected that from evening to night on the 12th, there will be strong convective weather in northern Dezhou, Binzhou, Dongying, northern Jinan, northern Zibo, Weifang, Yantai, Weihai and Qingdao, as well as Bohai Sea, Bohai Strait and northern Yellow Sea, accompanied by obvious thunder and lightning and local gusts of level 11 or above. At the same time, there are local hail and short-term heavy precipitation. To this end, the Shandong Meteorological Observatory issued the yellow warning of thunderstorm and thunder and lightning at 11:00 on May 12.