Severe thunderstorms are possible for portions of the Mississippi and Ohio River Valleys on Thursday ahead of an upper level trough moving across the Plains.

SPC Convective Outlook for Thursday

Thunderstorms will begin to develop Thursday afternoon mainly west of the Mississippi River Valley and move eastward. As thunderstorms develop, they will begin as individual cells and then merge into a squall line, mainly posing a damaging wind potential. Though damaging winds will be the main concern, a few tornadoes will also be possible, but they will be isolated. By Friday, the storms will pose a risk for much of the East Coast.

Simulated radar 9pm CST Thursday