how heavy can a hailstone be
Kneisler used a hailstone that measured 5.581 inches in diameter and weighed 1.68 lbs (a hailstone that was previously the largest measured in the U.S.) to calculate numbers necessary to estimate the size of the great hailstones in Revelation 16:21. Kneisler also assumed that the great hailstones would weigh 75 lbs in his analysis.