It shouldn't make you feel too good. What the wide spread of low probabilities means is that the uncertainties in the models are such that the center could pretty much go anywhere between a little east of you to a little west of Mobile.
While the concern is to evacuate New Orleans due to the large number of people and the relatively few freeways out of town, the rest of the warning area should also "rush preparations to completion".
I was doing OK in my blessed ignorance!! Now I'm almost ballistic. :>) Should I pack up and leave yet?