Thanks for the link. It shows that at 11am eastern Friday the predicted track was for east of Pensacola, but the 5pm track had shifted far to the west, to Pascagoula, MS. That's just 90 miles east of New Orleans, and in their bulletin they mentioned that it could shift further west. That was at 4pm NO time on Friday.
I would have said ..."Fair citizens of New Orleans, despite the uncertainty of the National Weather Service, I am convinced that Katrina will develop into a Category 5 hurricane and hit New Orleans head on. By the time we get confirmation from the NWS, it will be too late to evacuate this city. Therefore, I am order all citizens to immediately evacuate
... and we will have opened both inbound and outbound lanes of the freeway to outbound only traffic.