At the time the tornado struck, Joplin had a system of mostly 2001s and an RSH10 or two lingering. One is at a MSSU and was captured winding down from the first warning cycle in this video...
http://www.youtube.com/watch?v=DjMnvmja5BA
The other was located directly across the street from where the famous Fastrip freezer tornado video was taken.
Joplin also operates a couple 2001s in Airport Drive and a T-135 just south of Webb City.
Jasper County has been installing Sentry 16V1T-Bs including one on the east side of Duenweg heard in this video...
http://www.youtube.com/watch?v=MX3Dluy04QY