Cloud-to-Ground Lightning Activity in the 10–11 June 1985 Mesoscale Convective System Observed during the Oklahoma–Kansas PRE-STORM Project

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Abstract
As part of the field program for the Oklahoma–Kansas PRE-STORM Project conducted in May–June 1985, a network of electromagnetic direction-finders was deployed to locate and detect the polarity of cloud-to-ground (CG) lighting flashes associated with Mesoscale Convective Systems (MCSs). We present an analysis of such data for the 10–11 June MCS. This storm consisted of a line of convective cells trailed by an 80 km wide stratiform precipitation region. Data from the lightning strike locating network, along with both conventional and Doppler radar data, are analyzed over a significant portion of the storm's lifetime to examine the relationship between the storm precipitation structure and the position and polarity of the lighting activity. The majority of the negative CG activity is located in the convective precipitation region. The frequency of negative CG activity is highest around the period of most intense convective rainfall. Positive CG activity is mainly confined to the trailing stratiform ... Abstract As part of the field program for the Oklahoma–Kansas PRE-STORM Project conducted in May–June 1985, a network of electromagnetic direction-finders was deployed to locate and detect the polarity of cloud-to-ground (CG) lighting flashes associated with Mesoscale Convective Systems (MCSs). We present an analysis of such data for the 10–11 June MCS. This storm consisted of a line of convective cells trailed by an 80 km wide stratiform precipitation region. Data from the lightning strike locating network, along with both conventional and Doppler radar data, are analyzed over a significant portion of the storm's lifetime to examine the relationship between the storm precipitation structure and the position and polarity of the lighting activity. The majority of the negative CG activity is located in the convective precipitation region. The frequency of negative CG activity is highest around the period of most intense convective rainfall. Positive CG activity is mainly confined to the trailing stratiform ...

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