Ivan quickly weakened because of dry air, but it slowly reorganized itself, passing just south of Grenada as a major hurricane on September 7. The hurricane strengthened into a Category 5 hurricane while in the central Caribbean Sea. Over next the days its intensity changed largely due to eyewall replacement cycles, and Ivan passed just south of Jamaica, the Cayman Islands, and western Cuba with winds at or slightly below Category 5 status. Turning northward and encountering unfavorable conditions, Ivan slowly weakened before making landfall just west of Gulf Shores, Alabama, on September 16 with winds of 120 mph (195 km/h). The cyclone quickly weakened to tropical depression status as it turned to the northeast, and Ivan transitioned into an extratropical cyclone on September 18.