The previous record was 7 in in diameter, and fell to the ground in Aurora, Nebraska in 2003. This is not quite official yet, but is measuring 8 in in diameter and weighing in at 1 lb 15 oz, and was perhaps as large as 11 in before it melted to measured size.
Here’s a graphic on hail formation, and some more information here. It takes a tremendous amount of lift to keep stones that big aloft.
Also On This Site: Hurricanes By Popular Demand…Tornadoes! Some Links…The Greensburg Tornado on Doppler Radar…
A Short Post On Red Sprites And Blue Jets: Cosmic Origins Of Lightning?
