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Super Typhoon Mireille (international designation: 9119, JTWC designation: 21W) was the deadliest...

Super Typhoon Mireille (international designation: 9119, JTWC designation: 21W) was the deadliest typhoon of the 1991 Pacific typhoon season as it crossed Japan in September. A poorly organized area of convection was first noted in the monsoon trough over the southern Marshall Islands on September 13. It slowly organized, and became a tropical depression on September 15 (though operationally it was upgraded a day later). It continued to strengthen, reaching tropical storm status later on the September 15 and typhoon strength the next day. Mireille was a small storm, and after reaching a primary peak of 85 miles per hour (140 km/h) it weakened due to the larger circulation of Tropical Storm Luke to Mireille's north. After passing close to Guam and Saipan yet remaining far enough away to not cause much damage, Mireille escaped Luke's harm, and restrengthened. Initially a small storm, the typhoon increased in size from this point until its death. On September 21 and 22, it rapidly intensified to a peak of 150 mph (240 km/h) winds, and began to execute the Fujiwhara effect with Typhoon Nat in the South China Sea. After sending Nat southward, Mireille tuned to the northwest, retaining