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Context of '4:00 am August 29, 2005: NHC Advisory: Extremely Dangerous Katrina Lashes Northern Gulf Coast'

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The National Hurricane Center (NHC) warns that Katrina, still a Category 4 hurricane, continues to intensify and grow larger. The NHC reiterates the hurricane warning for Louisiana to Florida, and expands the area covered by a tropical storm warning. It warns further that, “While the details of the landfall intensity cannot be known at this time… Katrina will be a very dangerous hurricane at landfall…. It must be emphasized that the exact landfall point cannot be specified and that Katrina is a large hurricane that will affect a large area,” warns the NHC. “NHC now expects Katrina’s path to move north later today.” Other aspects of the NHC Advisory include:
bullet Location: 275 miles south-southeast of the mouth of the Mississippi River
bullet Direction and Speed: West-northwest at 10 mph
bullet Maximum Sustained Winds: Near 145 mph, with higher gusts
bullet Estimated Central Pressure: 935 mb
bullet Size: Hurricane force winds extend outward from center up to 85 miles; tropical storm force winds extend outward up to 185 miles
bullet Probability that in the next 69 hours, Katrina’s eye will pass within 75 miles of:
bullet Panama City, FL: 11 percent
bullet Gulfport, MS: 26 percent;
bullet New Orleans, LA: 29 percent [National Hurricane Center, 8/28/2005; National Hurricane Center, 8/28/2005; National Hurricane Center, 8/28/2005]

Entity Tags: National Hurricane Center, Hurricane Katrina

Timeline Tags: Hurricane Katrina

The National Hurricane Center (NHC) warns that Katrina is now a “potentially catastrophic Category 5 hurricane” and is headed for the Northern Gulf Coast. Although the NHC cannot predict the exact strength at landfall, Katrina is “expected to be a devastating Category 4 or 5 hurricane at landfall.” The NHC forecasts coastal storm surge flooding 15 to 20 feet above normal tide levels, with higher surges of up to 25 feet, as well as large and dangerous battering waves near and to the east of where the center makes landfall. Other aspects of the NHC Advisory include:
bullet Location: 250 miles south-southeast of the mouth of the Mississippi River
bullet Direction and Speed: West-northwest at 12 mph
bullet Maximum Sustained Winds: Near 160 mph, with higher gusts
bullet Estimated Central Pressure: 908 mb [National Hurricane Center, 8/28/2005; National Hurricane Center, 8/28/2005]

Entity Tags: National Hurricane Center, Hurricane Katrina

Timeline Tags: Hurricane Katrina

The National Hurricane Center (NHC)‘s midnight advisory leads with: “Potentially catastrophic [Category 5] Hurricane Katrina continues to approach the Northern Gulf Coast…sustained hurricane-force winds nearing the Southeastern Louisiana coast.” Already, a wind gust to 98 mph has been reported from Southwest Pass Louisiana. Katrina remains quite large, and will likely cause storm surge flooding of 18-22 feet above normal, with increased surge to 28 feet in some areas, and may overtop New Orleans’ levees. Some changes to Katrina’s structure indicates that there could be some weakening, although the NHC reiterates that Katrina likely will still be a very dangerous Category 4 hurricane at landfall. Other aspects of the NHC Advisory include:
bullet Location: 90 miles south-southwest of the mouth of the Mississippi River; 150 miles south-southeast of New Orleans
bullet Direction and Speed: North-northwest at near 10 mph
bullet Maximum Sustained Winds: Near 160 mph with higher gusts
bullet Estimated Central Pressure: 908 mb
bullet Size: hurricane winds now extend 105 miles from the center; tropical storm force winds extend 230 miles [National Hurricane Center, 8/29/2005]

Entity Tags: National Hurricane Center, Hurricane Katrina

Timeline Tags: Hurricane Katrina

The National Hurricane’s 4:00 am advisory warns that Katrina, now a very strong Category 4 hurricane, remains very large, is extremely dangerous, and is nearing landfall. Tropical storm-force winds are already lashing the Gulf Coast from Southeastern Louisiana to the Alabama-Florida border. A buoy located 50 miles east of the Mississippi River has reported waves as high as 46 feet already. Storm surge flooding will be 18-22 feet above normal, with increased surge to 28 feet in some areas, and levees in the greater New Orleans area may be overtopped. Although it appears that Katrina will make landfall as a Category 4 hurricane later this morning, the NHC warns that “just because Katrina is no longer a category 5 hurricane does not mean that extensive damage and storm surge flooding will not occur. This is still an extremely dangerous and potentially deadly hurricane!” Other aspects of the NHC Advisory include:
bullet Location: 90 miles south-southeast of New Orleans; about 120 miles south-southwest of Biloxi Mississippi
bullet Direction and Speed: North at near 15 mph
bullet Maximum Sustained Winds: 150 mph with higher gusts
bullet Estimated Central Pressure: 915 mb
bullet Size: hurricane winds extend 105 miles from the center; tropical storm force winds extend 230 miles [National Hurricane Center, 8/29/2005]

Entity Tags: Hurricane Katrina, National Hurricane Center

Timeline Tags: Hurricane Katrina

The National Hurricane Center (NHC) advises that Katrina is now a Category 2 hurricane with sustained winds of nearly 105 mph. Katrina remains huge, with hurricane force winds extending 125 miles from the center, and tropical storm force winds extending 230 miles. Katrina’s center is now 40 miles south-southwest of Hattiesburg, Mississippi. Minimum central pressure has increased to 940 MB. [National Hurricane Center, 8/29/2005]

Entity Tags: National Hurricane Center, Hurricane Katrina

Timeline Tags: Hurricane Katrina

The National Hurricane Center (NHC) advises that Katrina is now a still-dangerous Category 1 hurricane, with sustained winds of nearly 95 mph. The hurricane remains huge, with hurricane force winds extending 125 miles from the center, and tropical storm force winds extending 230 miles. Katrina’s center is now 20 miles south-southwest of Hattiesburg, Mississippi. [National Hurricane Center, 8/29/2005]

Entity Tags: Hurricane Katrina, National Hurricane Center

Timeline Tags: Hurricane Katrina

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