Lightning-flash locations related to the precipitation pattern of the storm

Triangulation from paired sferics (100 ± 50 kHz) received at stations 57 km apart gave 42 map locations of lightning flashes belonging to a thunderstorm well-defined on weather radar. This storm was one of many in a long line along the leading edge of a band of light stratiform precipitation (snow above 3 km). The band was 9 km high and 60 km wide, and the storms were embedded in it. The convective region of the storm studied had a north-south extent of 20 km, the east-west extent averaging two-thirds as much. Cumulus heights progressed from 3 km on the west to 7 ± 1 km on the east. Two-thirds of the lightning flashes were in the convective region. The remaining third were in 160 km 2 of the light stratiform precipitation immediately west of it.