EF0 tornado in Grady County, Oklahoma

Numerous storm chasers observed a brief tornado northwest of Tuttle. A television helicopter observed damage to chicken coops in the area, otherwise no other damage was reported.

As a closed upper low across the Baja Peninsula transitioned to an open wave and moved to the northeast, widespread convection developed from western-north Texas into much of Oklahoma during the evening of the 10th. Strong surface heating in the afternoon contributed to strong instability and, combined with increasing deep-layer wind shear, yielded an environment capable of organized thunderstorms. The most impactful storm of the event was a supercell thunderstorm that develop across west-central Oklahoma and tracked across the greater Oklahoma City metropolitan area, producing large to very large hail and a weak tornado. By mid-evening, a developing quasi-linear convective system (QLCS) produced sporadic (yet intense) thunderstorm wind damage across portions of far southern Oklahoma.