record hailstones

The 1970 Coffeyville hailstone weighed 1.67 pounds—about 757 g—and was the heaviest officially measured in the United States until 2010. It was surpassed by a hailstone in Vivian, South Dakota: NOAA verified a weight of 0.879 kg. For the world record, WMO lists a reported 1.02 kg hailstone in Gopalganj, Bangladesh, in 1986. Coffeyville is therefore an important historical U.S. record, but not the largest hailstone currently on record.