What is the largest Typhoon recorded as of 2021?

In early October 1979, an active monsoon trough existed in the western Pacific Ocean extending from the Philippines to the Marshall Islands. From this, the largest and most intense tropical cyclone ever recorded, Typhoon Tip, emerged.

The development of this typhoon was initially very slow. Tropical Storm Roger formed from the same monsoon trough southwest of Guam on October 3, 1979. The presence of this tropical storm prevented the development of another low pressure system (which would later become Typhoon Tip) to its southeast, near the Micronesian state of Pohnpei. However, the erratically moving low-pressure disturbance did gain enough strength to become designated as Tropical Depression 23 on 5 October. The tropical depression, still influenced by nearby Tropical Storm Roger, moved slowly and irregularly for several days while strengthening to become a tropical storm (Tropical Storm Tip). The storm was unable to intensify further, though, until Tropical Storm Roger tracked to the north, became entrained in the Westerlies, and turned extratropical on 8 October. After this, Tropical Storm Tip’s forward motion became more stable and the storm moved northwest towards Guam. Early on 9 October, Tropical Storm Tip turned to the west and developed into a typhoon. Very favorable conditions for strengthening, including outflow from extratropical Roger and the presence of a tropical upper-tropospheric trough, were in place at this time.