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      WMO World Record Lightning Extremes: Longest Reported Flash Distance and Longest Reported Flash Duration

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          Abstract

          <p class="first" id="P1">A World Meteorological Organization weather and climate extremes committee has judged that the world’s longest reported distance for a single lightning flash occurred with a horizontal distance of 321 km (199.5 mi) over Oklahoma in 2007, while the world’s longest reported duration for a single lightning flash is an event that lasted continuously for 7.74 seconds over southern France in 2012. In addition, the committee has unanimously recommended amendment of the AMS <i>Glossary of Meteorology</i> definition of lightning discharge as a “series of electrical processes taking place within 1 second” by removing the phrase “within one second” and replacing with “continuously.” Validation of these new world extremes (a) demonstrates the recent and on-going dramatic augmentations and improvements to regional lightning detection and measurement networks, (b) provides reinforcement regarding the dangers of lightning, and (c) provides new information for lightning engineering concerns. </p>

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          Most cited references28

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          A Combined TOA/MDF Technology Upgrade of the U.S. National Lightning Detection Network

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            WHERE ARE THE MOST INTENSE THUNDERSTORMS ON EARTH?

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              Meoscale Convective Complexes

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                Author and article information

                Journal
                Bulletin of the American Meteorological Society
                Bull. Amer. Meteor. Soc.
                American Meteorological Society
                0003-0007
                1520-0477
                June 2017
                June 2017
                : 98
                : 6
                : 1153-1168
                Article
                10.1175/BAMS-D-16-0061.1
                5240975
                28111477
                4c4a90d8-c56a-4b80-9e33-c64a9124c257
                © 2017

                http://www.ametsoc.org/PUBSReuseLicenses

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