Hi Jean....There's not much specific information about the 33rd parallel in the U.S. that isn't so widely spread around that it's difficult to get it all in one place.  I looked for a list of cities on that parallel, but I couldn't find one.  However, this link has a lot of information that might be helpful to know:

http://www.cuttingedge.org/News/n1788.cfm

I sure hope it opens for you...lately I haven't had much success in transferring links.  I've only had a computer since 2009, so I'm still learning.  Great information in your article to Ron, but the way!!

YsiC,

Arlene