Question: How many hours did the storm which surpassed Typhoon Nora in 2015, grow from a tropical storm to a Category 5 hurricane?
Context: Typhoon Elsie, known in the Philippines as Typhoon Tasing, was one of the most intense known tropical cyclones to make landfall in the Philippines.  A powerful Category 5 super typhoon, Elsie formed out of a tropical disturbance on October 13, 1989, and initially moved relatively slowly in an area of weak steering currents.  On October 15, the storm underwent a period of rapid intensification, attaining an intensity that corresponds to a Category 3 hurricane on the Saffir–Simpson Hurricane Scale.  After taking a due west track towards the northern Philippines, the storm intensified further, becoming a Category 5 super typhoon hours before making landfall in Luzon.  After moving inland, the typhoon rapidly weakened to a tropical storm.  Once back over water in the South China Sea, wind shear prevented re-intensifcation.  Elsie eventually made landfall in Vietnam on October 22 and dissipated the following day over Laos. 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. Hurricane Patricia was the second-most intense tropical cyclone on record worldwide, behind Typhoon Tip in 1979, with a minimum atmospheric pressure of 872 mbar (hPa; 25.75 inHg).  Originating from a sprawling disturbance near the Gulf of Tehuantepec, south of Mexico, in mid-October 2015, Patricia was first classified a tropical depression on October 20.  Initial development was slow, with only modest strengthening within the first day of its classification.  The system later became a tropical storm and was named Patricia, the twenty-fourth named storm of the annual hurricane season.  Exceptionally favorable environmental conditions fueled explosive intensification on October 22.  A well-defined eye developed within an intense central dense overcast and Patricia grew from a tropical storm to a Category 5 hurricane in just 24 hours—a near-record pace.  On October 23, the hurricane achieved its record peak intensity with maximum sustained winds of 215 mph (345 km/h).  This made it the most intense tropical cyclone on record in the Western Hemisphere, and the strongest globally in terms of 1-minute maximum sustained winds. Hurricane Hattie was the strongest and deadliest tropical cyclone of the 1961 Atlantic hurricane season, reaching a peak intensity equivalent to that of a Category 5 hurricane.  The ninth tropical storm and seventh hurricane and major hurricane of the season, Hattie originated from an area of low pressure that strengthened into a tropical storm over the southwestern Caribbean Sea on October 27.  Moving generally northward, the storm quickly became a hurricane and later major hurricane the following day.  Hattie then turned westward west of Jamaica and strengthened into a Category 5 hurricane, with maximum sustained winds of 160 mph .  It weakened to Category 4 before making landfall south of Belize City on October 31.  The storm turned southwestward and weakened rapidly over the mountainous terrain of Central America, dissipating on November 1. Hurricane Wilma was the most intense tropical cyclone ever recorded in the Atlantic basin, as well as the most intense recorded in the western hemisphere until Hurricane Patricia in 2015.  Part of the record-breaking 2005 Atlantic hurricane season, which included three of the top ten most intense Atlantic hurricanes ever (along with #4 Rita and #7 Katrina), Wilma was the twenty-second storm, thirteenth hurricane, sixth major hurricane, fourth Category 5 hurricane, and second-most destructive hurricane of the 2005 season.  A tropical depression formed in the Caribbean Sea near Jamaica on October 15, headed westward, and two days later intensified into a tropical storm which turned abruptly southward and was named "Wilma".  Wilma continued to strengthen, and eventually became a hurricane on October 18.  Shortly thereafter, explosive intensification occurred, and in only 24 hours, Wilma became a Category 5 hurricane with wind speeds of 185 mph . The 2007 Atlantic hurricane season was an active Atlantic hurricane season, although most of the storms were weak and short-lived.  However, the 2007 season was the first season to feature more than one Category 5 landfalling hurricane, a feat that would not be matched until 2017.  It produced 17 tropical cyclones, 15 tropical storms, six hurricanes, and two major hurricanes.  It officially started on June 1 and ended on November 30, dates which conventionally delimit the period during which most tropical cyclones form in the Atlantic Ocean.  The first tropical cyclone, Subtropical Storm Andrea, developed on May 9, while the last storm, Tropical Storm Olga, dissipated on December 13.  The most intense hurricane, Dean, is tied for the eighth most intense Atlantic hurricane ever recorded as well as the third most intense Atlantic hurricane at landfall.  The season was one of only six on record for the Atlantic with more than one Category 5 hurricane.  It was the second on record in which an Atlantic hurricane, Felix, and an eastern Pacific hurricane, Henriette, made landfall on the same day.  September had a record-tying eight storms, although the strengths and durations of most of the storms were low.  Aside from hurricanes Dean and Felix, none of the storms in the season exceeded Category 1 intensity. Hurricane Camille was the second-most intense tropical cyclone to strike the United States on record.  The most intense storm of the 1969 Atlantic hurricane season, Camille formed as a tropical depression on August 14 south of Cuba from a long-tracked tropical wave.  Located in a favorable environment for strengthening, the storm quickly intensified into a Category 2 hurricane before striking the western part of the nation on August 15.  Emerging into the Gulf of Mexico, Camille underwent another period of rapid intensification and became a Category 5 hurricane the next day as it moved northward towards the Louisiana–Mississippi region.  Despite weakening slightly on August 17, the hurricane quickly re-intensified back to a Category 5 before it made landfall in Waveland, Mississippi early on August 18 with a pressure of 900 mbar .  This was the second-lowest pressure recorded for a U.S. landfall; only the 1935 Labor Day hurricane had a lower pressure at landfall.  As Camille pushed inland, it quickly weakened and was a tropical depression by the time it was over the Ohio Valley.  Once it emerged offshore, it was able to restrengthen to a strong tropical storm, before it became extratropical, being absorbed by a cold front over the North Atlantic on August 22. Hurricane Carla ranks as the most intense U.S. tropical cyclone landfall on the Hurricane Severity Index.  The third named storm and first Category 5 hurricane of the 1961 Atlantic hurricane season, Carla developed from an area of squally weather in the southwestern Caribbean Sea on September 3.  Initially a tropical depression, it strengthened slowly while heading northwestward, and by September 5, the system was upgraded to Tropical Storm Carla.  About 24 hours later, Carla was upgraded to a hurricane.  Shortly thereafter, the storm curved northward while approaching the Yucatán Channel.  Late on September 7, Carla entered the Gulf of Mexico while passing just northeast of the Yucatán Peninsula.  By early on the following day, the storm became a major hurricane after reaching Category 3 intensity.  Resuming its northwestward course, Carla continued intensification and on September 11, it was upgraded to a Category 5 hurricane.  Later that day, Carla weakened slightly, but was still a large and intense hurricane when the storm made landfall near Port O'Connor, Texas.  It weakened quickly inland and was reduced to a tropical storm on September 12.  Heading generally northward, Carla transitioned into an extratropical cyclone on September 13, while centered over southern Oklahoma.  Rapidly moving northeastward, Carla's remnants reached the Labrador Sea, Canada and dissipated on September 17, 1961. Typhoon Hester was a severe typhoon that formed in the 1952 Pacific typhoon season and continued into January 1953.  As the twenty-ninth storm and twentieth typhoon of the season, it was first tracked by Joint Typhoon Warning Center (JTWC) near Marshall Islands as a tropical storm on December 27.  Hester quickly became a typhoon and rapidly intensified.  Near the end of the year, Hester became a Category 5 typhoon on the modern-day Saffir–Simpson hurricane wind scale south of Guam.  The typhoon soon weakened quickly as it curved eastward and sped up.  It weakened into a tropical storm on January 4, and JTWC ceased tracking it hours later. Hurricane Felix was the southernmost landfalling Category 5 hurricane in the Atlantic; surpassing Hurricane Edith of 1971.  It was also the most recent Atlantic hurricane to make landfall as a Category 5 until Hurricane Irma in 2017.  It was the sixth named storm, second hurricane, and second Category 5 hurricane of the 2007 Atlantic hurricane season.  Felix formed from a tropical wave on August 31, passing through the southern Windward Islands on September 1 before strengthening to attain hurricane status.  A day later it rapidly strengthened into a major hurricane, and early on September 3 it was upgraded to Category 5 status; by 2100 UTC, the hurricane was downgraded to Category 4 status, but was upgraded to a Category 5 hurricane for the second and final time by the morning of September 4.
Answer: 24