The warning time for cloud-to-ground lightning in isolated, ordinary thunderstorms over Houston, Texas

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dc.contributor.advisor Orville , Richard E en_US
dc.contributor.committeeMember Carey , Lawrence D en_US
dc.creator Clements , Nathan Chase en_US
dc.date.accessioned 2010 -01 -15T00 :11 :30Z
dc.date.accessioned 2014 -02 -19T19 :31 :22Z
dc.date.available 2010 -01 -15T00 :11 :30Z
dc.date.available 2014 -02 -19T19 :31 :22Z
dc.date.created 2007 -12 en_US
dc.date.issued 2009 -05 -15 en_US
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2421
dc.description.abstract Lightning detection over Houston , Texas is possible with the Lightning Detection and Ranging (LDAR -II ) network and the National Lightning Detection Network (NLDN ) . A comparison of the two datasets in conjunction with 37 isolated , ordinary thunderstorms reveals a time separation of 3 .1 minutes between the first detected Very High Frequency (VHF ) source (i .e . first intracloud discharge ) and the first cloud -toground (CG ) lightning flash . This CG warning time is increased to 16 .1 minutes when using the radar -defined criterion of when the 30 -dBZ contour first reaches the -10 ?C isotherm level . Several attempts were made to establish a similar characteristic that could be used to forewarn the occurrence of the final CG in this storm type . Based on the average radar characteristics during the last CG flash in each thunderstorm case , CG activity comes to an end when the 45 -dBZ echo falls below the -10 ?C isotherm . Detection efficiencies that remain slightly less than perfect for each network may have allowed for some error when analyzing VHF sources and ground flashes for each convective case . Exhibiting this possible error , four cases actually recorded a greater number of CG flashes than intracloud flashes , which is contrary to typical lightning characteristics . Future studies hope to increase the number of thunderstorm cases to analyze as the LDAR network continues to observe more lightning events . Also , similar approaches could be implemented in differing geographic regions of the country to observe if these lightning characteristics vary depending on latitude , longitude , or climate . en_US
dc.format.medium electronic en_US
dc.format.mimetype application /pdf en_US
dc.language.iso en _US en_US
dc.subject lightning en_US
dc.title The warning time for cloud -to -ground lightning in isolated , ordinary thunderstorms over Houston , Texas en_US
dc.type Book en
dc.type.genre Electronic Thesis en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

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The warning time for cloud-to-ground lightning in isolated, ordinary thunderstorms over Houston, Texas. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2421 .

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