[PAR] [TLE] Typhoon Joan (1997) [SEP] Typhoon Joan of October 1997 was the longest-lasting super typhoon at the time, maintaining 1-minute maximum sustained winds of at least 240 km/h (150 mph) for 4.5 days.  Joan, concurrently with Typhoon Ivan to its west, also became the strongest typhoons at the same time in the northwest Pacific Ocean.  The 25th named storm during the active 1997 Pacific typhoon season, Joan developed from the same trough as Typhoon Ivan on October 11.  It moved northwestward and later to the west, undergoing explosive deepening to its peak intensity on October 15.  One typhoon warning agency estimated that Joan was among the strongest storms on record in the basin, and that Ivan and Joan marked the first occurrence of simultaneous super typhoons.  While near peak intensity, Joan passed between Anatahan and Saipan in the Northern Marianas Islands.  Later, the typhoon weakened and turned to the north and east, becoming extratropical on October 24. [PAR] [TLE] 1997 Pacific typhoon season [SEP] The 1997 Pacific typhoon season has no official bounds; it ran year-round in 1997, but most tropical cyclones tend to form in the northwestern Pacific Ocean between May and November.  These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.  This was the most active tropical cyclone season ever recorded, with a record ten Category 5 storms forming and with an ACE of 594.11.
[PAR] [TLE] Typhoon Joan ( 1997 ) [ SEP ] Typhoon Joan of October 1997 was the longest - lasting super typhoon at the time , maintaining 1-minute maximum sustained winds of at least 240 km / h ( 150 mph ) for 4.5 days . Joan , concurrently with Typhoon Ivan to its west , also became the strongest typhoons at the same time in the northwest Pacific Ocean . The 25th named storm during the active 1997 Pacific typhoon season , Joan developed from the same trough as Typhoon Ivan on October 11 . It moved northwestward and later to the west , undergoing explosive deepening to its peak intensity on October 15 . One typhoon warning agency estimated that Joan was among the strongest storms on record in the basin , and that Ivan and Joan marked the first occurrence of simultaneous super typhoons . While near peak intensity , Joan passed between Anatahan and Saipan in the Northern Marianas Islands . Later , the typhoon weakened and turned to the north and east , becoming extratropical on October 24 . [PAR] [TLE] 1997 Pacific typhoon season [ SEP ] The 1997 Pacific typhoon season has no official bounds ; it ran year - round in 1997 , but most tropical cyclones tend to form in the northwestern Pacific Ocean between May and November . These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean . This was the most active tropical cyclone season ever recorded , with a record ten Category 5 storms forming and with an ACE of 594.11 .
Typhoon Joan was the 25th named storm of a season that had what ACE rating?
Typhoon Joan was the 25th named storm of a season that had what ACE rating ?
594.11
594.11