this article says the worst case scenario is from the due south:
http://www.nola.com/hurricane/index.ssf ... one_1.html
"The worst case is a hurricane moving in from due south of the city," said Suhayda, who has developed a computer simulation of the flooding from such a storm. On that track, winds on the outer edges of a huge storm system would be pushing water in Breton Sound and west of the Chandeleur Islands into the St. Bernard marshes and then Lake Pontchartrain for two days before landfall. "
- end quote -
Sadly, that is just what is predicted now. Just think about it for a second- the NHC is currently predicting what could be the worst disaster in US history.
*shudder*