3/28 1200Z GFS forecast of 2m temperatures at 1800Z and today's observations at ~1800z. The 10C line splits the center of IN with 8C at the top. These are similarly forecasted in Illinois. While there are little current temperatures to compare in IN, in IL temperatures appear to be a few degrees warmer than forecasted yesterday.
South of IN, a line of storms is currently in the Kentucky, Tennessee border
the following is the GFS forecasted and observed skew-t at Nashville for the 1200Z time period
(The forecast sounding is seen in purple) Generally, the forecast sounding lines up with the observations aside from the inversion being slightly stronger than forecasted. Upper levels are also slightly dryer than forecasted but this is to be expected with sounding data.