The 5-foot-11, 170-pound Ali visited each of the schools in the last week, and will make the decision in front of his teammates, family and the coaching staff at Timber Creek.
"Maryland, I feel like it's stable, it's home," Ali said. "It's the same with Louisville. I have family there already, so I definitely feel like I'm home. Pitt is a new, good feeling. I can see when (former teammate) Adonis Jennings is going there. I like everything they're doing. I like everyone Louisville is doing, and especially Maryland."
Ali visited Pittsburgh for a camp with his team last week, and got an in-depth look at the campus and met with the staff for a while.
"I took a tour and all that because I didn't participate (in the camp)," Ali said. "The liveliness (stood out). It's summer vacation and you still have a lot of students on campus having fun. People were coming up to me, ‘Hey, Kareem.' I liked how most people have a summer job and they stay back on campus. The coaches are always on campus. I like that."
Ali camped at Maryland so he could work with defensive coordinator and defensive backs coach Brian Stewart.
"Working with him was just like working with my dad," Ali said. "He's a father figure on the field and he definitely knows what he's talking about. His experience, I trust him. And coach (Randy) Edsall and experience working with defensive backs, I trust that, too. I trust their experience and I like how they treat me, like one of their sons."
After visiting Pittsburgh and Maryland, Ali went to Louisville for a family function, and also stopped in to see the coaching staff.
"I met with the entire staff," Ali said. "Coach (Bobby) Petrino, he actually stayed and we had a meeting with him. He was telling me how he's at Louisville to stay, and they are going for a national championship, and they're looking to keep things rolling.
"Talking to (defensive backs) coach (Terrell) Buckley and his experience in the NFL, and he's pretty much a Hall of Famer. That speaks for itself. Watching him work, they had a mat drill practice, watching that was incredible. I liked everything. I liked their defense."Scout.com will be in attendance for Ali's announcement