Shortly after peaking in intensity, the hurricane again weakened as it underwent an eyewall replacement cycle. At 1415 UTC on September 12 Ivan passed 25 miles (40 km) south-southwest of George Town, Cayman Islands, with winds of 150 mph (240 km/h). After its eyewall became re-established Ivan attained Category 5 status for a third time early on September 13. Shortly thereafter, a trough created a weakness in the ridge to its north, causing the hurricane to turn to the northwest. The combination of the combination of enhanced outflow from the trough and very warm waters allowed Ivan to maintain Category 5 status for 30 hours. Early on September 14 the hurricane passed through the Yucatán Channel about 17 miles (28 km) southwest of Cabo San Antonio, Cuba, with the eastern portion of the eyewall crossing the western portion of the island.