SPC AC 112000 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0300 PM CDT Tue Aug 11 2026 Valid 112000Z - 121200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON INTO EARLY TONIGHT ACROSS PARTS OF THE MIDDLE OHIO VALLEY... Severe thunderstorms with damaging wind gusts will continue today across parts of the Ohio Valley and central Appalachians. Large hail and severe wind gusts are also forecast over parts of the northern Plains. ..Weinman.. 08/11/2026 .PREV DISCUSSION... /ISSUED 1111 AM CDT Tue Aug 11 2026/ ...IL/IN/OH... A fast moving and intense bowing MCS is affecting the Chicago metro area this morning with significant severe wind gusts. Nevertheless, sufficient flow aloft and mesoscale organization will maintain a risk of damaging wind gusts.