The National Weather Service says that potentially world's largest hailstone fell yesterday in South Dakota. The stone was 8 inches in diameter and 19 inches in circumference -- comparable to a basketball.
The stone fell in South Dakota on July 26th. The hail storm is reported to have left “craters in the ground”, and smashed car windshields with ease.I freaked out over a quarter-sized hailstorm a few months ago -- I can't imagine a storm like this.
Picture, also from the Examiner and KSFY-TV: