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4:00 pm August 28, 2005: NHC Advisory: Hurricane Potentially Catastrophic; Levee Overtopping Possible

The National Hurricane Center (NHC) Advisory leads by warning, “Potentially catastrophic Hurricane Katrina headed for the Northern Gulf Coast.” Conditions are already deteriorating along portions of the central and northeastern Gulf Coast, and they will continue to deteriorate throughout the evening. Katrina, still a Category 5 hurricane, is likely to make landfall with Category 4 or 5 intensity. The NHC reiterates that storm surge flooding will be 18-22 feet above normal, with increased surge to 28 feet in some areas, and warns that “some levees in the greater New Orleans area could be overtopped.” Katrina’s minimum central pressure is now the fourth lowest on record in the Atlantic. Other aspects of the NHC Advisory include:
bullet Location: 150 miles south-southeast of the mouth of the Mississippi River
bullet Direction and Speed: Northwest at near 13 mph
bullet Maximum Sustained Winds: 175 mph with higher gusts
bullet Estimated Central Pressure: 902 mb
bullet Size: Hurricane winds extend 105 miles from the center; tropical storm force winds extend outward for 230 miles
bullet Probability that in the next 69 hours, Katrina’s eye will pass within 75 miles of:
bullet Panama City, FL: 5 percent
bullet Gulfport, MS: 38 percent
bullet New Orleans, LA: 47 percent [National Hurricane Center, 8/28/2005; National Hurricane Center, 8/28/2005; National Hurricane Center, 8/28/2005]

Entity Tags: Hurricane Katrina, National Hurricane Center

Timeline Tags: Hurricane Katrina


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