"the longest WMO-recognized lightning flash is the single stratiform flash that covered a horizontal distance of 768 ± 8 km (467.2 ± 5 mi) across parts of the s

"the longest WMO-recognized lightning flash is the single stratiform flash that covered a horizontal distance of 768 ± 8 km (467.2 ± 5 mi) across parts of the southern United States on 29 April 2020. The greatest WMO-recognized duration for a single lightning flash is 17.102 ± 0.002 s from the flash that developed continuously through the stratiform region of a thunderstorm over Uruguay and northern Argentina on 18 June 2020" Wow!