NORMAN, OKLAHOMA HAILSTORM - April 28, 2021

Here is an example from a damaging hailstorm that struck the Norman Oklahoma area on the evening of 28 April 2021.  A CoCoRaHS observer filed this hail report that documented a two-minute burst of large hail that caused considerable damage to homes and vehicles.  The observer also took photographs of the largest hailstones along with a ruler to accurately indicate the dimensions of the stones.

Scientists studying that hailstorm contacted CoCoRaHS HQ and provided us with a plot showing data from the Oklahoma City NWS radar made at the time of the CoCoRaHS hail report: