Katrina moved in a northerly direction as it continued to work its way around the ridge of high-pressure centered over northern Florida. Indeed, the storm now occupied most of the northern Gulf. Katrina also increased dramatically in size, and by late on August 28 th, tropical force winds extended out almost 200 nautical miles from the storm's center, and hurricane force winds extended out between 90 and 100 miles. In the next 12 hours Katrina would strengthen from a category 3 hurricane to a category 5 reaching peak intensity 170 nautical miles south east of the mouth of the Mississippi River. On August 27 th, Katrina turned towards the west and then made a north westerly turn on August 28 as the storm moved around the western edge of a retreating high pressure ridge that was now breaking down and moving in an easterly direction. By the end of the day, tropical storm-force winds extended as much as 140 nautical miles from the center of the eye.
A significant expansion of the wind field was observed on August 27 th as Katrina nearly doubled in size. A well-defined eye became evident on August 27 th as Katrina became a category 3 hurricane 365 nautical miles southeast of the mouth of the Mississippi River. Indeed, Katrina exhibited two periods of intensification between August 26 and 28, 2005. However, Katrina continued to move west SW and regained hurricane status which it had lost passing over Florida.Ĭonditions in the Gulf were optimal for rapid intensification.
Initial predictions indicated Katrina would turn sharply north after crossing the west coast of the Florida peninsula and make a second landfall on the Florida Panhandle. Katrina spent six hours crossing Florida in a west SW direction, emerging into the south eastern Gulf of Mexico on Augnorth of Cape Sable. Hurricane Katrina was now less than 20 hours from making landfall on the east coast of Florida. Initially, the storm moved in a north-westerly direction but was turned in a westerly direction over warm waters where it strengthened reaching hurricane status on August 25, 2005. On Augtropical depression 12 became the 11 th tropical storm of the 2005 Atlantic hurricane season when it was centered over the central Bahamas. The storm, which was designated tropical depression 12, became more organized during the evening of August 23, 2005. The system developed into a new tropical depression on Augover the southeastern Bahamas approximately 175 nautical miles southeast of Nassau. The area of showers and thunderstorms moved slowly Northwest passing North of Hispaniola before becoming more organized just east of the Turks and Caicos on the afternoon of August 22, 2005. Hurricane Katrina was conceived when a topical wave moved through the Leeward Islands and merged with the remnants of a tropical depression north of Puerto Rico on Aug( 1). Contingency plans also need to be made should outside disaster relief be markedly delayed as was the case with Katrina.
Current disaster plans may be inadequate should facilities be inaccessible for months because of damage or contamination. Approximately 200 patients, and 1500 additional personnel would be evacuated on Wednesday and Thursday from a makeshift heliport on Tulane's parking garage. For several days, faculty, residents, nurses and hospital personnel performed heroically, caring for patients in appalling conditions, hand-ventilating critically ill patients in shifts. Temperatures in the hospitals soared into the upper 90's and conditions were made intolerable by 100% humidity and backed-up sewage. Emergency generators provided power for 36 hours before running out of fuel. Later that day, levees that protected the city failed and several feet of water entered the hospitals and school buildings. On Monday, AugHurricane Katrina passed east of New Orleans causing minimal damage to Tulane's Medical Center.
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