Hurricane Katrina (image) National Science Foundation Share Print E-Mail Caption The peak winds of over 100 miles per hour that buffeted New Orleans, La., during Hurricane Katrina could have been much worse had the storm made landfall at a different moment in the cycle of its eyewall. Long-lived, intense hurricanes often go through an eyewall replacement cycle that takes a day or so to complete. The result is collapse of the main eyewall and temporary weakening of the storm. This water vapor band image shows Katrina's weakened eyewall being further disrupted by interaction with the land surface at 5:45 a.m. on Monday, Aug. 29, 2005. Credit Jeff Weber, a University Corporation for Atmospheric Research (UCAR) scientist, generated the image using GEMPAK software and data from the water vapor and infrared bands of the National Oceanic and Atmospheric Administration's (NOAA) GOES-E (Geostationary Operational Environmental) satellite. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.