http://www.srh.noaa.gov/crp/docs/research/hurrhistory/Carla/carla.html
I just read through this again, it has the storm surge info. I was young then and just observed what I saw, lol.
My 3 brothers are in the NASSA area.
I was always told that Carla was coming ashore south of Corpus.. but, stopped, backed up.. and, came in again further North.. Which was part of the reason the storm surges were so high.
I know, they have 20+ foot surges in Freeport. I was 2 1/2 years old.. but, I absolutely remember being with my mother in a shelter at a High School gym. There were cots set up... and, we stayed there all night. Most of the memories ar vague... but, parts are quite vivid.