Lightning signatures in convective storms on the High Plains

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Title: Lightning signatures in convective storms on the High Plains
Author: Martinez, Maribel
Abstract: An understanding of the association between storm intensity and lightning activity may help forecasters better distinguish between severe and non -severe storms . Seven storms were analyzed in this study in attempt to better understand lightning behavior relative to storm severity . Six of the cases analyzed produced severe weather . The main distinguishing factor between non -severe and severe storms was a flash rate increase and a radiation spread in the 4 to 10 km regions . Each of the cases produced +CG lightning but more importantly experienced a polarity reversal . In cases where either a tornado warning was issued or an actual tornado was reported , the polarity reversal occurred before all tornadic events . The polarity reversal itself was associated with a decrease in lightning in the mid -levels of the temporal height distributions . Peak currents also increased in strength after the reversal . The study shows that total lightning behavior , although it may vary from region to region , differs in severe and non -severe stages of thunderstorms
URI: http : / /hdl .handle .net /2346 /15222
Date: 2003-12


Lightning signatures in convective storms on the High Plains. Master's thesis, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /15222 .

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