Thunderstorm Wind in Johnston County, Oklahoma

Widespread thunderstorm wind damage occurred in Mannsville. At least ten homes received varying degrees of roof damage, several power poles were snapped and at least one outbuilding was destroyed. The Mannsville School also received minor damage. The event time is estimated based on radar observations.

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.