weakened into a subtropical depression. Tropical Depression Maymay On October 9, the JTWC started to monitor a persisting area of convection with a poorly-defined circulation at approximately to the east of Manila, Philippines. Under a favorable environment of warm sea surface temperatures, low to moderate wind shear, and strong poleward outflow, the system continued to organize before PAGASA upgraded it as a tropical depression, naming it as Maymay, late on October 10. The JMA subsequently followed suit by the next day. Later that same day, the JTWC issued a TCFA on Maymay, noting that the storm's center was tucked beneath the southeast side of an intense but disorganized convection. However, the storm's convective structure was detached from the main center due to a TUTT cell to the northeast of it, which made the storm weaken as it moved northwestwards, prompting the JMA to downgrade Maymay into a low-pressure area on October 12. The PAGASA subsequently followed suit late on the same day, and JTWC cancelled their TCFA by October 13. Though short-lived, Maymay killed two people in Cagayan, Philippines. The Provincial Disaster Risk Reduction Management Office (PDDRMO) in Cagayan estimated infrastructure and agricultural damage at ₱533 million (US$9.16 million) and 33,432 individuals were impacted by Maymay. Tropical Depression 21W On October 12, the JTWC started to monitor an organizing area of convection with a fully obscured low-level center at approximately to the west of Saipan. Within a favorable environment of low wind shear, warm sea surface temperatures, and fair equatorial outflow, the agency would later issue a TCFA for the system four hours later, and initiate advisories on Tropical Depression 21W at 15:00 UTC the same day, noting the convection of the system became compact and symmetrical, and was displaced slightly from the center. The JMA followed suit three hours later. The system soon became severely sheared by the next day as wind shear increased dramatically while it continued moving eastward, before it got embedded into a convergent outer boundary of a deep TUTT cell positioned towards the northwest, helping the storm re-organize and intensify into a tropical storm by October 14. The storm, however, accelerated north-northeastwards at that point, as it got embedded under strong southerly flow within the eastern periphery of a broad subtropical upper-level low that would later become Tropical Storm Haitang, and it soon opened up into a tropical wave later the same day. Tropical Storm