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

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 Glossary of Meteorology 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

[1]  Richard J. Blakeslee,et al.  Where Are the Lightning Hotspots on Earth , 2015 .

[2]  Jerry M. Straka,et al.  TELEX: The Thunderstorm Electrification and Lightning Experiment , 2008 .

[3]  P. Jones,et al.  The Twentieth Century Reanalysis Project , 2009 .

[4]  J. Montanyà,et al.  Asymmetries in bidirectional leader development of lightning flashes , 2013 .

[5]  Mary Ann Cooper,et al.  National Athletic Trainers' Association position statement: lightning safety for athletics and recreation. , 2013, Journal of athletic training.

[6]  R. Maddox.  Meoscale Convective Complexes , 1980 .

[7]  Eric C. Bruning,et al.  Environmental controls on storm intensity and charge structure in multiple regions of the continental United States , 2015 .

[8]  Steven J. Goodman,et al.  A Diagnostic Analysis of the Kennedy Space Center LDAR Network , 2001 .

[9]  Yang Zhang,et al.  Observations of narrow bipolar events reveal how lightning is initiated in thunderstorms , 2016, Nature Communications.

[10]  Kenneth L. Cummins,et al.  The U.S. National Lightning Detection NetworkTM and Applications of Cloud-to-Ground Lightning Data by Electric Power Utilities , 1998 .

[11]  Céline Lutoff,et al.  HYMEX , a 10-year Multidisciplinary Program on the mediterranean water cycle. , 2014 .

[12]  P. Krehbiel,et al.  Accuracy of the Lightning Mapping Array , 2003 .

[13]  Michael Davis,et al.  GPS‐based mapping system reveals lightning inside storms , 2000 .

[14]  R. Orville,et al.  Evolution of the total lightning structure in a leading‐line, trailing‐stratiform mesoscale convective system over Houston, Texas , 2008 .

[15]  S. Rutledge,et al.  Transient luminous events above two mesoscale convective systems: Charge moment change analysis , 2011 .

[16]  W. D. Rust,et al.  Electrical structure in thunderstorm convective regions: 1. Mesoscale convective systems , 1998 .

[17]  Paul Krehbiel,et al.  A GPS‐based three‐dimensional lightning mapping system: Initial observations in central New Mexico , 1999 .

[18]  V. Ducrocq,et al.  An overview of the lightning and atmospheric electricity observations collected in southern France during the HYdrological cycle in Mediterranean EXperiment (HyMeX), Special Observation Period 1 , 2014 .

[19]  Kenneth L. Cummins,et al.  A Combined TOA/MDF Technology Upgrade of the U.S. National Lightning Detection Network , 1998 .

[20]  Chuntao Liu,et al.  Characteristics of lightning flashes with exceptional illuminated areas, durations, and optical powers and surrounding storm properties in the tropics and inner subtropics , 2013 .

[21]  Kenneth L. Cummins,et al.  Upward lightning observations from towers in Rapid City, South Dakota and comparison with National Lightning Detection Network data, 2004-2010 , 2012 .

[22]  T. Lang,et al.  Transient luminous events above two mesoscale convective systems , 2010 .

[23]  Eric C. Bruning,et al.  Lightning Mapping Array flash detection performance with variable receiver thresholds , 2016, Journal of geophysical research. Atmospheres : JGR.

[24]  M. Stock,et al.  Continuous broadband digital interferometry of lightning using a generalized cross‐correlation algorithm , 2014 .

[25]  Thomas C. Peterson,et al.  World Meteorological Organization Assessment of the Purported World Record 58°C Temperature Extreme at El Azizia, Libya (13 September 1922) , 2013 .

[26]  David P. Yorty,et al.  WHERE ARE THE MOST INTENSE THUNDERSTORMS ON EARTH , 2006 .

[27]  F. Marzano,et al.  HyMeX-SOP1: The Field Campaign Dedicated to Heavy Precipitation and Flash Flooding in the Northwestern Mediterranean , 2013 .

[28]  J. Montanyà,et al.  Bidirectional leader development in sprite‐producing positive cloud‐to‐ground flashes: Origins and characteristics of positive and negative leaders , 2014 .

[29]  R. Thomas,et al.  Lightning channel length and flash energy determined from moments of the flash area distribution , 2015 .

[30]  S. Cummer,et al.  Three years of lightning impulse charge moment change measurements in the United States from ELF observations , 2013, 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS).