I'm not answering for Clark but this excerpt from the 5:00 says it all. If the official forecast track verifies in the short term, and I think this will happen in the next 24hrs, everyone along the east coast from S Florida to the Carolinas needs to prepare at least for the west side (weak side) of a Cat 1- Cat 2 hurricane --- any small deviation in the track could significantly change the impact level in your area. I sound like Mister Obvious don't I. Here is some back up to my post that I should have included, see attachment..

HOWEVER...UNTIL HANNA BEGINS A
MORE DEFINITIVE MOTION...IT WILL BE DIFFICULT TO NARROW THE
POTENTIAL IMPACT AREA. IN ADDITION...THE ANTICIPATED ANGLE OF
APPROACH TO THE SOUTHEAST UNITED STATES COAST MEANS THAN ONLY A
SMALL DEVIATION LEFT OR RIGHT OF THE TRACK WILL HAVE LARGE
IMPLICATIONS IN BOTH TIME AND LOCATION OF LANDFALL. IN FACT...THE
WIND SPEED PROBABILITY PRODUCT INCLUDED WITH THIS ADVISORY PACKAGE
SHOWS THAT THE CHANCES OF HURRICANE-FORCE WINDS ARE ABOUT EQUAL AT
EACH SPECIFIC LOCATION ALONG THE COAST FROM FLORIDA THROUGH THE
CAROLINAS.
This post not meant to sound alarmist