Severe potential diminishing, but not gone.

The 17Z GOES Skew-T sounding shows much greater CAPE than earlier, just shy of 4000, as well as a lifted index of -7.  The SWEAT index was also close to 300 as well in this sounding.  At the same time, the latest (18Z) SPC Mesoanalysis does not concur with that very well at all, showing CAPE of 1000 in the area.  Much of the dynamics needed to fuel severe thunderstorms are concentrated farther north in Illinois, Indiana and Ohio, and storms are already firing up in central and northern Indiana and into northern Ohio.  All of that being said, severe storms cannot be ruled out here in the area, but conditions just are not that conducive here for widespread severe weather.  Severe weather, if any, will likely be very isolated.