From UIL site:
4A Qualifiers **as of January 12, 2013, 1:00pm
5A Qualifiers **as of January 12, 2013, 1:00pm
Due to scratches, all qualifiers are subject to change.
Edited 8:03 p.m.*: 4A qualifiers now as of 4:00 p.m.
If you want to stay on top of the official lists, just go here every once in a while in case there are changes.
*No, I'm not watching/listening to Mr. Propaganda...