How many hours did the storm which surpassed Typhoon Nora in 2015, grow from a tropical storm to a Category 5 hurricane?
Typhoon Nora (1973) Typhoon Nora was the fourth-most intense tropical cyclone on record. Originating from an area of low pressure over the western Pacific, Nora was first identified as a tropical depression on October 2, 1973. Tracking generally westward, the system gradually intensified, attaining typhoon status the following evening. After turning northwestward, the typhoon underwent a period of rapid intensification, during which its central pressure decreased by 77 mb (hPa; 2.27 inHg) in 24 hours. At the end of this phase, Nora peaked with winds of 295 km/h (185 mph) and a pressure of 877 mb (hPa; 25.91 inHg), making it the most-intense tropical cyclone on record (alongside Typhoon Ida in 1958) at the time; however, this pressure has since been surpassed by two other typhoons and one hurricane. The typhoon subsequently weakened and turned northwestward as it approached the Philippines. After brushing Luzon on October 7, the system passed south of Taiwan and ultimately made landfall in China on October 10. Once onshore, Nora quickly weakened and dissipated the following day.
Typhoon Cimaron (2006) Typhoon Cimaron, known in the Philippines as Typhoon Paeng, was the most intense tropical cyclone to strike the Philippine island of Luzon since Typhoon Zeb in 1998. Originating from a tropical depression on October 25, Cimaron developed within an environment strongly favoring tropical cyclogenesis east of the Philippines. On October 28, the system underwent rapid intensification, culminating in attaining its peak strength with winds of 185 km/h (115 mph). Estimates from the Joint Typhoon Warning Center ranked the system as a Category 5-equivalent super typhoon with one-minute sustained winds of 260 km/h (160 mph), though this is argued to have underrepresented the typhoon's strength. The system moved ashore near Casiguran, Aurora in northern Luzon at peak strength. Crossing the island, Cimaron emerged over the South China Sea where conditions allowed for temporary reorganization. After becoming nearly stationary on November 1, the typhoon executed a tight anti-cyclonic loop and rapidly weakened. The storm degraded to a tropical depression on November 4 before dissipating three days later off the coast of Vietnam.