The record has been broken. According to the National Oceanic and Atmospheric Administration, a hailstone fell in Aurora, Nebraska, on June 22, 2003, which had a diameter of 7 inches and circumference of 18.75 inches. This hailstone, however, only weighed 1.3 pounds.
Early on the evening of September 3, 1970, the heaviest hailstone on record fell in Coffeyville. The hailstone measured 17.5 inches in circumference, weighed 1.67 pounds and scientists estimated that it struck the ground at the speed of 105 MPH. The stone was sent to the National Center for Atmospheric Research in Boulder, Colorado, and a replica is on display at the Dalton Defenders Museum.