Since it was pretty definite yesterday evening that NO would get some amount of storm, even if not a direct hit, she should have been advising people to gas up, take preliminary precautions to storm-protect your house, and for those who haven't visited relatives inland in a while, that this would be a nice weekend to schedule that visit
My guess is that they want to clear out the areas south of NO and surrounding areas first (which are subject to mandatory evacuation orders), before clearing out NO itself, in order to regulate the traffic flow.
She's not too bright to figure out how to get that message out. I live in Lake Charles and when I went to get supplies, it was pretty dead in Walmart this morning, the traffic on I10 was light. Usually it's back to back with a cat 3 storm aiming at us. Of course people could be going to the casinos instead of passing through ;)
Most of the people I know who were around for Audrey don't wait for someone to tell them to get out. They still remember being taken by surprised. They have told their children and grandchildren the horrors. My uncles worked with the Red Cross on the clean up and the stories they told stuck with me.