1972 in the summer, a rare hail occurred in Hebei province, destroying tens of thousands of acres of farmland with promising harvest. With great pain, he conducted extensive and in-depth investigation, repeatedly consulted professional literature at home and abroad, and spent two years writing "Introduction to Hail". At the same time, we formed a research group with other comrades, systematically developed a set of look-up tables and calculation programs, and explored a new rainstorm forecasting method. From 65438 to 0976, Lei Yushun and his colleagues helped Beijing Meteorological Observatory to forecast the weather and provided accurate weather forecast for Tangshan earthquake relief. 198 1 August, a flood peak appeared in the upper reaches of the Yangtze River, which seriously threatened the lives and property of people in the middle and lower reaches. If flood diversion measures are taken, the relocation fee alone will cost hundreds of millions of yuan. Lei Yushun and his colleagues used the energy weather analysis method to make a correct judgment and avoid the huge losses caused by flood diversion. During the flood season of 1982, the water level of the Yellow River exceeded the warning line due to continuous rainstorm. According to the accurate and timely forecast made by Lei Yushun and his colleagues, the water conservancy, meteorology, hydrology and other departments effectively controlled the water regime of the Yellow River.