Its raining hard today and I drove my cherokee out. While driving I noticed an unusual grinding, rubbing, squeaking sound when turning left. No noise when turning right at all.

I'm pretty sure it has something to do with being wet, been driving it very regularly and there has been no unusual sounds.

Any ideas?

 

There are many things it could be. Get down there and take a look. I'd start at the brakes, then u joint, then wheel bearing.