低云、降水、大雾和大风是影响航空飞行活动最为常见的几个气象要素。在国际航空飞行史上,因低云和降水影响而造成飞行事故的比例最大。在国内,根据我国1951～1988年间245次与气象有关的严重飞行事故的统计表明,首先也是低云降水造成的飞行事故最多,约占55.5%,其次是大雾,再次是大风等。在民航方面,根据1979～1989年国际民航组织公布的资料来看,这十一年间,共发生飞行事故1447 Low clouds, precipitation, heavy fog and high winds are the most common meteorological elements that affect air travel. In the history of international aviation flight, the largest proportion of flying accidents were caused by low clouds and precipitation. In China, according to the statistics of 245 serious weather-related serious flight accidents from 1951 to 1988 in our country, the first is also the most accidents caused by low-level precipitation, accounting for 55.5%, followed by heavy fog and again strong winds. In terms of civil aviation, according to the information released by ICAO from 1979 to 1989, there were a total of 1447 flight accidents in these eleven years