It was raining. I was driving on the highway at approximately 60-65 MPH range. I was coming out of a long gradual curve and the steering would not center. It started to have a slight fish tail feel. Normally I let off the throttle and it will level out. This time it acted like i had yanked the steering wheel to the right. I dont recall feeling pressure or resistance from the steering wheel reflecting from the tires actually being turned, but i cant confidently say there wasn't. Nonetheless, it caused me to spin into the ditch. If it would have decided to go the other direction I would have gone into the car next to me or oncoming traffic. It gradually started getting a loose feel on the highway up to that point. Prior to the accident, when in inclement weather she would have a fishtail feel coming out of turns (Sometimes while just traveling straight). I tried not to drive on the highway during inclement conditions afterwards because she still had the same symptoms. I think the best way to describe it: Somewhere in the steering components it is initially resistant to return to center. Instead it teeters back and forth like a pendulum before finally returning to center.