Three things!
P. AF300 1512A KATRINA OB 13
MAX FL WIND 114 KT NE QUAD 03:20:40 Z
LIGHTNING OBSERVED BRIEFLY IN NE EYEWALL

Lightning is usually a sign of a storm intensifying. As reflected by the current pressure and it's drop.

Margie used the "Buzzsaw" word that's the worst thing you want to see or hear before a landfall. It usually signifies a storm that will have it's name retired.
Gilbert, Mitch to name a few. Do a Goggle Image search for those two storms and see the similarity in the appearance of the 'saw'.

If there are watches and warnings posted close to you. I'll say 60 miles of where you are. Please make sure that you have a plan ready for daylight.
This storm may change it's course before landfall. I don't want Anyone to be caught off guard!
Secure your home and family and get the heck out of Dodge. I would rather leave Dodge than have to dodge trees, flying debris and flood waters.