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From June 30 to September 14,1989,about 2000 cloud-to-ground lightning location data have been collected by athree-direction-finder network in Beijing.These data have been used to study the spatial distribution of lightning in-cluding thunderstorm day,thunder density and thunderstorm hour.As a result of the terrain elevation,a clearlyidentifiable influence from the underlying topography was found.The lightning activity was mainly concentrated on thesunny side of the mountain,i.e.,the east slope of Taihang Mountain,then eastward along the south side of YanshanMountain.The comparison analysis of lightning data and radar echoes from several mesoscale convective systems in 1989 and1990 suggests that lightning data can be used to determine the convective activity,its development probability and inten-sity.It can also be used to identify the different stages of a storm.The grid lightning data may be used in regional fore-casting of storm.Case analysis shows that it is possible to forecast the position of active echo 30 minutes to an hour afterlightning occurrence by using grid lightning data.
From June 30 to September 14, 1989, about 2000 cloud-to-ground lightning location data have been collected by athree-direction-finder network in Beijing. These data have been used to study the spatial distribution of lightning in-cluding thunderstorm day, thunder density and thunderstorm hour. As a result of the terrain elevation, a clearly identifiable influence from the underlying topography was found. The lightning activity was mainly concentrated on thesunny side of the mountain, ie, the east slope of Taihang Mountain, then eastward along the south side of YanshanMountain. the comparison analysis of lightning data and radar echoes from several mesoscale convective systems in 1989 and1990 suggests that lightning data can be used to determine the convective activity, its development probability and in-time. It can also be used to identify the different stages of a storm.The grid lightning data may be used in regional fore-casting of storm. Case analysis shows that it is possible to forecast th e position of active echo 30 minutes to an hour afterlightning occurrence by using grid lightning data.