Evolution of Cloud-to-Ground Lightning Discharges in Tornadic Thunderstorms

Evolution of Cloud-to-Ground Lightning Discharges in Tornadic Thunderstorms
Author :
Publisher :
Total Pages : 77
Release :
ISBN-10 : 1423528093
ISBN-13 : 9781423528098
Rating : 4/5 (098 Downloads)

Book Synopsis Evolution of Cloud-to-Ground Lightning Discharges in Tornadic Thunderstorms by : Wendy L. Seaman

Download or read book Evolution of Cloud-to-Ground Lightning Discharges in Tornadic Thunderstorms written by Wendy L. Seaman and published by . This book was released on 2000-02 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air Force operations are directly impacted by weather on a daily basis. Erroneous forecasts negatively impact mission readiness and consequently cost the government time, in terms of wasted man-hours, and money. Advanced forecast lead-time could make a difference to minimize loss to both USAF personnel and assets. This study examined lightning data from 64 storm events from 1995-2000 in search of unique lightning signatures indicative of tornadic activity. Overall flash rates, percentage of positive flashes, positive and negative peak currents and multiplicity for each case were separated into two categories based on tornado intensity and season of occurrence. Based on the research results, there is little evidence to support the theory that specific lightning trends emerge prior to tornadogenesis. Due to the inconsistent and unreliable nature of the results, exclusive use of this time-series technique is not recommended for use in operational forecasting. The use of conventional methods, such as radar and/or satellite, used in conjunction with cloud-to- ground lightning flash data may, however, provide insight as to how electrical and physical changes relate to the development of tornadoes within a storm. Intracloud lightning may also provide additional information on tornado development and should be included in future research projects.


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