Yes, if the JROTC unit is an Honor Unit with Distinction.
DD #1 received JROTC nominations to USMA, USAFA and USNA through her AJROTC unit which was an Honor Unit with Distinction. DD received an appointment to USAFA solely on that one nomination, as her other MOC noms were to USMA. However, she chose to attend USCGA, and is very happy with her decision!
Wow! In three years this is the first I've read about someone getting an appointment to an SA with just an ROTC nom. Congratulations to your DD, best of luck at USCGA