 Koinu at peak intensity while nearing landfall on Taiwan on October 4 | |
| Meteorological history | |
|---|---|
| Formed | September 28, 2023 |
| Dissipated | October 9, 2023 |
| Very strong typhoon | |
| 10-minute sustained (JMA) | |
| Highest winds | 165 km/h (105 mph) |
| Lowest pressure | 940 hPa (mbar); 27.76 inHg |
| Category 4-equivalent typhoon | |
| 1-minute sustained (SSHWS/JTWC) | |
| Highest winds | 220 km/h (140 mph) |
| Lowest pressure | 936 hPa (mbar); 27.64 inHg |
| Overall effects | |
| Fatalities | 1 |
| Injuries | 399 |
| Missing | None |
| Damage | $18 million (2023 USD) |
| Areas affected |
|
| IBTrACS | |
Part of the 2023 Pacific typhoon season | |
Typhoon Koinu, known in the Philippines as Typhoon Jenny, was a strong and damaging tropical cyclone that made landfall on the southern tip of Taiwan and affected Hong Kong. Koinu, a replacement name for Tembin which means puppy or Canis Minor in Japanese, was the fourteenth named storm and ninth typhoon of the 2023 Pacific typhoon season. Koinu originated from an area of low pressure near Guam that generally moved westward into the Philippine Sea, where it was upgraded into a depression.
Koinu later underwent rapid intensification and became a Category 3-equivalent typhoon. The storm then weakened before intensifying to attain its peak intensity as a category 4-equivalent typhoon. Koinu passed close by Lanyu then made landfall over Hengchun, Taiwan.