Model Baroclinicity for Next Tuesday

Here is a simple illustration of baroclinicity. Both images from
http://www.rap.ucar.edu/weather/model/

The top image is the pressure and wind pattern from the GFS (7 AM on Weds Mar 18, valid 7 PM Tues Mar 24). Notice the center of low pressure in northwestern Minnesota, but moreover the concentric pattern of the isobars.

And above we have the temperatures from/for the same times. Notice the bulgy, almost s-shaped pattern going from Nebraska or so into Minnesota. If you overlaid the two images, you would see the isotherms and isobars intersect eachother, as in below (from an earlier model run, courtesy of College of DuPage http://www.weather.cod.edu)