largest hailstone ever recorded in the world
New U.S. record hailstone falls in South Dakota Well, hereâs one for the record books. An intense hailstorm in Vivian, South Dakota last Friday produced a giant hailstone 8â³ in diameter and weighing in at 1.9 pounds! The NWS in Aberdeen, South Dakota and a 3 person NOAA team confirms the record for the largest hailstone ever recorded in the United States. Abredeen NWS photos. (Click to enlarge). 55-year old ranch worker Les Scott found the new record chunk of ice.