Lack of low level moisture was the theme this day. Good shear was present, however due to limited moisture, cloud bases were too high to produce tornadoes. Storms formed over south central Kansas and right turned into northwest Oklahoma as they became supercells. One storm even developed a clear slot and tried to produce a funnel. The intense lightning caused several grassland fires as well. Hail to the size of tennisballs also fell. They persisted through early evening before weakening due to loss of daytime heating. Very photogenic to say the least!