Sonca Late on October 11, the JTWC started to monitor a scattered area of convection with a poorly-organized broad low-level center at approximately to the west-southwest of Manila, Philippines. Within a marginally favorable environment of no distinct outflow established, low to moderate wind shear, and warm sea surface temperatures, the system slightly organized by the next day, with flaring convection and its center remaining exposed. Nonetheless, the JMA upgraded the system into a tropical depression on October 13. The JTWC later issued a TCFA on the system on the same day, noting fragmented deep convection was wrapping into its broad low-level center. By the next day, the JTWC initiated advisories on the storm, designating it as 22W. Moving westward, the storm intensified into a tropical storm six hours later, with the JMA naming it as Sonca. Sonca failed to intensify further as its center remained exposed, with deep convection displaced to the west due to strong wind shear, and it soon made landfall on Da Nang, Vietnam late on the same day, prompting the JTWC to issue their final advisory on the system. The JMA followed suit by October 15, as Sonca weakened into a tropical depression. As Sonca moved inland, it brought heavy rainfall to central Vietnam, with of rain fell in Da Nang during a 24-hour period on ; this resulted in major flooding throughout the region, with 10 fatalities reported. Initial estimated economic losses in Da Nang City caused by Sonca's heavy precipitation are around 1.48 trillion VND (US$60.8 million). Infrastructure losses in Thừa Thiên Huế province reached 337 billion VND (US$13.5 million). 2 people were killed and 4 injured in the province. Typhoon Nesat (Neneng) Nesat formed from an area of disturbed weather east of the Philippines, and on October 13, entered the PAGASA's Philippine Area of Responsibility and was named Neneng by the agency. Neneng continued to intensify in the Philippine Sea and was given the international name of Nesat by the Japan Meteorological Agency. On October 16, at 3:50 a.m. Philippine Standard Time, the PAGASA noted that Nesat (Neneng) made its first landfall in the island of Calayan in the province of Cagayan as a severe tropical storm. According to the PAGASA, Nesat underwent "extreme" rapid intensification and became a typhoon after it passed through the Luzon Strait. A day after, Nesat exited the PAR, and the PAGASA stopped issuing advisories on the system.