Here is the NWS severe weather outlook.

 ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS THE MIDWEST/MIDDLE MS
   RIVER VALLEY/OZARKS...
   
   ...SYNOPSIS...
   AN AMPLIFIED LONGWAVE PATTERN WILL PERSIST OVER THE CONUS INTO
   THURSDAY. THIS WILL BE HIGHLIGHTED BY A DEEP/EXTENSIVE
   LONGWAVE TROUGH CENTERED OVER EAST-CENTRAL CANADA AND THE GREAT
   LAKES REGION...TO THE NORTH AND EAST OF A BROAD UPPER RIDGE OVER THE
   WESTERN/SOUTHERN CONUS.
   
   ...MIDWEST/GREAT LAKES REGION AND MIDDLE MS VALLEY/OZARKS...
   THE SOUTHERN PORTION OF THE EAST-CENTRAL CANADA LONGWAVE TROUGH IS
   EXPECTED TO CONTINUE TO AMPLIFY AND SPREAD EAST-SOUTHEASTWARD OVER
   THE GREAT LAKES REGION/MIDWEST ON THURSDAY. AN ASSOCIATED COLD FRONT
   WILL MAKE A STEADY EASTWARD PROGRESSION ACROSS MUCH OF THE
   REGION...WITH A SLOWER/MORE SOUTHEASTWARD MOVEMENT OF THE FRONT
   ACROSS THE OZARKS AND SOUTHERN PLAINS. THAT SAID...IT SEEMS LIKELY
   THAT THE COLD FRONT WILL BE EFFECTIVELY AUGMENTED BY EARLY DAY
   PRECIPITATION/POSSIBLE RESIDUAL OUTFLOW AND CLOUD COVER ACROSS THE
   UPPER MS VALLEY AND WESTERN GREAT LAKES VICINITY. ESPECIALLY FOR
   AREAS SUCH AS LOWER MI...THESE FACTORS /ALONG WITH A MORE MODEST
   MOISTURE CONTENT/ PUT INTO QUESTION THE DEGREE OF AFTERNOON
   DESTABILIZATION.
   
   REGARDLESS...IT SEEMS LIKELY THAT TSTMS WILL INCREASE/INTENSIFY
   THURSDAY AFTERNOON ALONG THE /EFFECTIVE/ COLD FRONT WITHIN A
   RELATIVELY MOIST/MODERATELY UNSTABLE BOUNDARY LAYER. IT IS PROBABLE
   THAT THE STRONGEST DESTABILIZATION WILL OCCUR THURSDAY AFTERNOON
   ACROSS THE OZARKS VICINITY INTO DOWNSTATE IL AND PERHAPS
   INDIANA...WITH AS MUCH AS 1500-2500 J/KG MLCAPE POSSIBLE. THE
   STRONGEST FORCING FOR ASCENT/VERTICAL SHEAR WILL TEND TO LAG THE
   COLD FRONT EXCEPT FOR THE GREAT LAKES REGION...BUT EVEN REMOVED FROM
   THE STRONGER FORCING/VERTICAL SHEAR...STRONGER/MORE CERTAIN
   DESTABILIZATION FARTHER SOUTHWEST INTO THE MIDDLE MS VALLEY/OZARKS
   WILL ACCOUNT FOR ORGANIZED/SUSTAINED SEVERE TSTM POTENTIAL. WITH
   MULTICELLS AND PERHAPS SOME SUPERCELLS POSSIBLE...DAMAGING WINDS AND
   BOUTS OF SEVERE HAIL WILL BE THE PRIMARY HAZARDS...ESPECIALLY FROM
   MID-AFTERNOON THROUGH MID-EVENING THURSDAY. TSTMS SHOULD CONTINUE TO
   SPREAD EAST-SOUTHEASTWARD THURSDAY NIGHT ACROSS THE OH VALLEY/LOWER
   GREAT LAKES/MID-SOUTH...BUT WITH A GRADUALLY DIMINISHING SEVERE
   THREAT BY THE LATE EVENING/OVERNIGHT HOURS.