 On August 25, Tropical Storm Joan formed in the open Western Pacific, and attained typhoon status early the next day.As Joan moved to the west-northwest, it continued to rapidly intensify, reaching Super Typhoon status on the 28th and peak winds of 195 mph (314 km/h) on the 29th.Such winds are dubious, due to the infancy of Reconnaissance Aircraft at the time and the lack of satellite images.