Transfer Student Fall 2015 Chances?

<p>I was accepted into UW-Madison out of high school with a 3.9 GPA and 30 ACT. I think my essays and extracurriculars were good too. I decided to go to Northwestern instead. Now after a year and a half at Northwestern, I'm going to apply to transfer for fall 2015 at Madison. My GPA at Northwestern hasn't been great though (like 2.8). What do you think are my chances of getting accepted as a transfer student?</p>