Super Typhoon Nancy (1961)

https://en.wikipedia.org/wiki/Typhoon_Nancy_(1961)

Records

A reconnaissance aircraft flying into the typhoon near its peak intensity on September 12 determined Nancy's one-minute sustained winds to be 185 knots (215 mph; 345 km/h). If these values are reliable, they would be the highest wind speeds ever measured in a tropical cyclone.^[5] However, it was later determined that measurements and estimations of wind speeds from the 1940s to 1960s were excessive. Thus, Nancy's winds may actually be lower than its official best-track value.^[5] In 2016, reanalysis of Hurricane Patricia noted that the storm had the same sustained winds as Nancy, the highest on record in the Western Hemisphere.^[6]

Although the Saffir–Simpson hurricane wind scale (SSHWS) did not exist at the time, Nancy would have been a Category 5 equivalent for a total of five and a half days (or 132 hours), assuming the wind speed data are reliable. If so, this is the record for the Northern Hemisphere and more than a day longer than the runner-up system, 1962's Typhoon Karen, that also occurred during global cooling.