Typhoon Usagi

Typhoon Usagi, known in the Philippines as Super Typhoon Odette, was a violent tropical cyclone which affected Taiwan, the Philippines, China, and Hong Kong in September 2013. , or which means the constellation Lepus in Japanese, was the fourth typhoon and the nineteenth tropical storm in the basin. Developing into a tropical storm east of the Philippines late on September 16, Usagi began explosive intensification on September 19 and ultimately became a violent and large typhoon. Afterwards, the system weakened slowly, crossed the Bashi Channel on September 21, and made landfall over Guangdong, China on September 22. Meteorological history Early on September 16, 2013, the Japan Meteorological Agency (JMA) started to monitor a tropical depression, that had developed within an area of low-moderate vertical windshear about to the east of Manila in the Philippines. During that day as the systems low level circulation centre became better defined, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on the system while the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) named the system Odette. Late on the same day, JMA upgraded the system to a tropical storm and named it Usagi; at the same time, The JTWC upgraded it to a tropical depression 17W, owing to a tropical upper tropospheric trough cell located to the east in association with an anticyclone enhancing the outflow in the eastern and southern quadrants.