SD Hailstone New U.S. Recordholder

SD Hailstone New U.S. Recordholder toggle caption Anonymous/NOAA National Weather Service It's official. That giant hailstone found in Vivian, SD on July 23 now holds the record as the largest ever discovered in the U.S. since people began keeping tabs on such things. The National Climate Extremes Committee, part of the National Oceanic and Atmospheric Administration and the final arbiter of such weather records, measured the hailstone at eight inches in diameter. And as massive as the South Dakota hailstone was, according to the guy who found it, ranch hand Leslie Scott, there was even more to behold and hold before it started to melt.